diff --git a/src/lib/seam/connect/internal/schemas.ts b/src/lib/seam/connect/internal/schemas.ts
index 344280c07..3a5603299 100644
--- a/src/lib/seam/connect/internal/schemas.ts
+++ b/src/lib/seam/connect/internal/schemas.ts
@@ -43,6 +43,7 @@ export {
   customer_data,
   customer_portal,
   customer_portal_theme,
+  datetime,
   device_capability_flags,
   device_metadata,
   device_provider,
diff --git a/src/lib/seam/connect/models/access-codes/managed-access-code.ts b/src/lib/seam/connect/models/access-codes/managed-access-code.ts
index e5540bc7d..da233953d 100644
--- a/src/lib/seam/connect/models/access-codes/managed-access-code.ts
+++ b/src/lib/seam/connect/models/access-codes/managed-access-code.ts
@@ -1,5 +1,6 @@
 import { z } from 'zod'
 
+import { datetime } from '../datetime.js'
 import { device_and_connected_account_error_options } from '../devices/index.js'
 import { access_code_pending_mutations } from './pending-mutations.js'
 
@@ -12,9 +13,7 @@ const common_access_code_error = z.object({
   is_access_code_error: z
     .literal(true)
     .describe('Indicates that this is an access code error.'),
-  created_at: z
-    .string()
-    .datetime()
+  created_at: datetime
     .optional()
     .describe('Date and time at which Seam created the error.'),
 })
@@ -224,9 +223,7 @@ const common_access_code_warning = z.object({
     .describe(
       'Detailed description of the warning. Provides insights into the issue and potentially how to rectify it.',
     ),
-  created_at: z
-    .string()
-    .datetime()
+  created_at: datetime
     .optional()
     .describe('Date and time at which Seam created the warning.'),
 })
@@ -508,10 +505,9 @@ export const access_code = z.object({
     .describe(
       'Code used for access. Typically, a numeric or alphanumeric string.',
     ),
-  created_at: z
-    .string()
-    .datetime()
-    .describe('Date and time at which the access code was created.'),
+  created_at: datetime.describe(
+    'Date and time at which the access code was created.',
+  ),
   errors: z.array(
     z.discriminatedUnion('error_code', [
       ...access_code_error.options,
@@ -560,17 +556,13 @@ export const access_code = z.object({
   is_managed: z
     .literal(true)
     .describe('Indicates whether Seam manages the access code.'),
-  starts_at: z
-    .string()
-    .datetime()
+  starts_at: datetime
     .nullable()
     .optional()
     .describe(
       'Date and time at which the time-bound access code becomes active.',
     ),
-  ends_at: z
-    .string()
-    .datetime()
+  ends_at: datetime
     .nullable()
     .optional()
     .describe(
diff --git a/src/lib/seam/connect/models/access-codes/pending-mutations.ts b/src/lib/seam/connect/models/access-codes/pending-mutations.ts
index 0fb36b5ab..e1b8e43aa 100644
--- a/src/lib/seam/connect/models/access-codes/pending-mutations.ts
+++ b/src/lib/seam/connect/models/access-codes/pending-mutations.ts
@@ -1,10 +1,11 @@
 import { z } from 'zod'
 
+import { datetime } from '../datetime.js'
+
 const common_pending_mutation = z.object({
-  created_at: z
-    .string()
-    .datetime()
-    .describe('Date and time at which the mutation was created.'),
+  created_at: datetime.describe(
+    'Date and time at which the mutation was created.',
+  ),
   message: z.string().describe('Detailed description of the mutation.'),
 })
 
@@ -25,12 +26,9 @@ const deferring_creation = common_pending_mutation
       .describe(
         "Mutation code to indicate that Seam is waiting until closer to the access code's start time before programming it on the device.",
       ),
-    scheduled_at: z
-      .string()
-      .datetime()
-      .describe(
-        'Date and time at which Seam will attempt to program this access code on the device.',
-      ),
+    scheduled_at: datetime.describe(
+      'Date and time at which Seam will attempt to program this access code on the device.',
+    ),
   })
   .describe(
     "Seam is waiting until closer to the access code's start time before programming it on the device.",
@@ -101,28 +99,20 @@ const updating_time_frame = common_pending_mutation
       ),
     from: z
       .object({
-        starts_at: z
-          .string()
-          .datetime()
+        starts_at: datetime
           .nullable()
           .describe('Previous start time for the access code.'),
-        ends_at: z
-          .string()
-          .datetime()
+        ends_at: datetime
           .nullable()
           .describe('Previous end time for the access code.'),
       })
       .describe('Previous time frame configuration.'),
     to: z
       .object({
-        starts_at: z
-          .string()
-          .datetime()
+        starts_at: datetime
           .nullable()
           .describe('New start time for the access code.'),
-        ends_at: z
-          .string()
-          .datetime()
+        ends_at: datetime
           .nullable()
           .describe('New end time for the access code.'),
       })
diff --git a/src/lib/seam/connect/models/access-grants/access-grant.ts b/src/lib/seam/connect/models/access-grants/access-grant.ts
index 0d1272ac5..63184a602 100644
--- a/src/lib/seam/connect/models/access-grants/access-grant.ts
+++ b/src/lib/seam/connect/models/access-grants/access-grant.ts
@@ -1,13 +1,13 @@
 import { z } from 'zod'
 
+import { datetime } from '../datetime.js'
 import { access_grant_pending_mutations } from './pending-mutations.js'
 import { requested_access_method } from './requested-access-method.js'
 
 const common_access_grant_error = z.object({
-  created_at: z
-    .string()
-    .datetime()
-    .describe('Date and time at which Seam created the error.'),
+  created_at: datetime.describe(
+    'Date and time at which Seam created the error.',
+  ),
   message: z
     .string()
     .describe(
@@ -37,10 +37,9 @@ const cannot_create_requested_access_methods_error =
     `)
 
 const common_access_grant_warning = z.object({
-  created_at: z
-    .string()
-    .datetime()
-    .describe('Date and time at which Seam created the warning.'),
+  created_at: datetime.describe(
+    'Date and time at which Seam created the warning.',
+  ),
   message: z
     .string()
     .describe(
@@ -272,17 +271,13 @@ export const access_grant = z.object({
     .describe(
       'Instant Key URL. Only returned if the Access Grant has a single mobile_key access_method. ',
     ),
-  created_at: z
-    .string()
-    .datetime()
-    .describe('Date and time at which the Access Grant was created.'),
-  starts_at: z
-    .string()
-    .datetime()
-    .describe('Date and time at which the Access Grant starts.'),
-  ends_at: z
-    .string()
-    .datetime()
+  created_at: datetime.describe(
+    'Date and time at which the Access Grant was created.',
+  ),
+  starts_at: datetime.describe(
+    'Date and time at which the Access Grant starts.',
+  ),
+  ends_at: datetime
     .nullable()
     .describe('Date and time at which the Access Grant ends.'),
   display_status: z
diff --git a/src/lib/seam/connect/models/access-grants/access-method.ts b/src/lib/seam/connect/models/access-grants/access-method.ts
index 52c93e65a..95ca18094 100644
--- a/src/lib/seam/connect/models/access-grants/access-method.ts
+++ b/src/lib/seam/connect/models/access-grants/access-method.ts
@@ -1,10 +1,11 @@
 import { z } from 'zod'
 
+import { datetime } from '../datetime.js'
+
 const common_access_method_warning = z.object({
-  created_at: z
-    .string()
-    .datetime()
-    .describe('Date and time at which Seam created the warning.'),
+  created_at: datetime.describe(
+    'Date and time at which Seam created the warning.',
+  ),
   message: z
     .string()
     .describe(
@@ -83,10 +84,9 @@ const _access_method_warning_map = z.object({
 export type AccessMethodWarningMap = z.infer<typeof _access_method_warning_map>
 
 const common_access_method_error = z.object({
-  created_at: z
-    .string()
-    .datetime()
-    .describe('Date and time at which Seam created the error.'),
+  created_at: datetime.describe(
+    'Date and time at which Seam created the error.',
+  ),
   message: z
     .string()
     .describe(
@@ -120,10 +120,9 @@ export type AccessMethodErrorMap = z.infer<typeof _access_method_error_map>
 
 // Pending mutations for access methods
 const common_pending_mutation = z.object({
-  created_at: z
-    .string()
-    .datetime()
-    .describe('Date and time at which the mutation was created.'),
+  created_at: datetime.describe(
+    'Date and time at which the mutation was created.',
+  ),
   message: z.string().describe('Detailed description of the mutation.'),
 })
 
@@ -188,30 +187,16 @@ const updating_access_times_mutation = common_pending_mutation
       ),
     from: z
       .object({
-        starts_at: z
-          .string()
-          .datetime()
+        starts_at: datetime
           .nullable()
           .describe('Previous start time for access.'),
-        ends_at: z
-          .string()
-          .datetime()
-          .nullable()
-          .describe('Previous end time for access.'),
+        ends_at: datetime.nullable().describe('Previous end time for access.'),
       })
       .describe('Previous access time configuration.'),
     to: z
       .object({
-        starts_at: z
-          .string()
-          .datetime()
-          .nullable()
-          .describe('New start time for access.'),
-        ends_at: z
-          .string()
-          .datetime()
-          .nullable()
-          .describe('New end time for access.'),
+        starts_at: datetime.nullable().describe('New start time for access.'),
+        ends_at: datetime.nullable().describe('New end time for access.'),
       })
       .describe('New access time configuration.'),
   })
@@ -272,13 +257,10 @@ export const access_method = z.object({
     .describe(
       'Access method mode. Supported values: `code`, `card`, `mobile_key`, `cloud_key`.',
     ),
-  created_at: z
-    .string()
-    .datetime()
-    .describe('Date and time at which the access method was created.'),
-  issued_at: z
-    .string()
-    .datetime()
+  created_at: datetime.describe(
+    'Date and time at which the access method was created.',
+  ),
+  issued_at: datetime
     .nullable()
     .describe('Date and time at which the access method was issued.'),
   is_issued: z
diff --git a/src/lib/seam/connect/models/access-grants/pending-mutations.ts b/src/lib/seam/connect/models/access-grants/pending-mutations.ts
index 7163bbe86..b7b927742 100644
--- a/src/lib/seam/connect/models/access-grants/pending-mutations.ts
+++ b/src/lib/seam/connect/models/access-grants/pending-mutations.ts
@@ -1,10 +1,11 @@
 import { z } from 'zod'
 
+import { datetime } from '../datetime.js'
+
 const common_pending_mutation = z.object({
-  created_at: z
-    .string()
-    .datetime()
-    .describe('Date and time at which the mutation was created.'),
+  created_at: datetime.describe(
+    'Date and time at which the mutation was created.',
+  ),
   message: z.string().describe('Detailed description of the mutation.'),
 })
 
@@ -51,30 +52,16 @@ const updating_access_times_mutation = common_pending_mutation
       .describe('IDs of the access methods being updated.'),
     from: z
       .object({
-        starts_at: z
-          .string()
-          .datetime()
+        starts_at: datetime
           .nullable()
           .describe('Previous start time for access.'),
-        ends_at: z
-          .string()
-          .datetime()
-          .nullable()
-          .describe('Previous end time for access.'),
+        ends_at: datetime.nullable().describe('Previous end time for access.'),
       })
       .describe('Previous access time configuration.'),
     to: z
       .object({
-        starts_at: z
-          .string()
-          .datetime()
-          .nullable()
-          .describe('New start time for access.'),
-        ends_at: z
-          .string()
-          .datetime()
-          .nullable()
-          .describe('New end time for access.'),
+        starts_at: datetime.nullable().describe('New start time for access.'),
+        ends_at: datetime.nullable().describe('New end time for access.'),
       })
       .describe('New access time configuration.'),
   })
diff --git a/src/lib/seam/connect/models/access-grants/requested-access-method.ts b/src/lib/seam/connect/models/access-grants/requested-access-method.ts
index c4c0927e2..fb7561077 100644
--- a/src/lib/seam/connect/models/access-grants/requested-access-method.ts
+++ b/src/lib/seam/connect/models/access-grants/requested-access-method.ts
@@ -1,5 +1,7 @@
 import { z } from 'zod'
 
+import { datetime } from '../datetime.js'
+
 export const requested_access_method = z.object({
   display_name: z.string().describe('Display name of the access method.'),
   mode: z
@@ -24,12 +26,9 @@ export const requested_access_method = z.object({
     .describe(
       "Maximum number of times the instant key can be used. Only applicable when mode is 'mobile_key'. Defaults to 1 if not specified.",
     ),
-  created_at: z
-    .string()
-    .datetime()
-    .describe(
-      'Date and time at which the requested access method was added to the Access Grant.',
-    ),
+  created_at: datetime.describe(
+    'Date and time at which the requested access method was added to the Access Grant.',
+  ),
   created_access_method_ids: z
     .array(z.string().uuid())
     .describe(
diff --git a/src/lib/seam/connect/models/acs/acs-access-group.ts b/src/lib/seam/connect/models/acs/acs-access-group.ts
index f38558704..96f4ae891 100644
--- a/src/lib/seam/connect/models/acs/acs-access-group.ts
+++ b/src/lib/seam/connect/models/acs/acs-access-group.ts
@@ -1,5 +1,6 @@
 import { z } from 'zod'
 
+import { datetime } from '../datetime.js'
 import { schedule } from '../schedule.js'
 import { acs_access_group_pending_mutations } from './acs-access-groups/pending-mutations.js'
 
@@ -22,10 +23,9 @@ export type AcsAccessGroupExternalType = z.infer<
 >
 
 const common_acs_access_group_error = z.object({
-  created_at: z
-    .string()
-    .datetime()
-    .describe('Date and time at which Seam created the error.'),
+  created_at: datetime.describe(
+    'Date and time at which Seam created the error.',
+  ),
   message: z
     .string()
     .describe(
@@ -62,10 +62,9 @@ const _acs_access_group_error_map = z.object({
 export type AcsAccessGroupErrorMap = z.infer<typeof _acs_access_group_error_map>
 
 const common_acs_access_group_warning = z.object({
-  created_at: z
-    .string()
-    .datetime()
-    .describe('Date and time at which Seam created the warning.'),
+  created_at: datetime.describe(
+    'Date and time at which Seam created the warning.',
+  ),
   message: z
     .string()
     .describe(
@@ -146,10 +145,9 @@ const common_acs_access_group = z.object({
     .describe(
       'Display name that corresponds to the brand-specific terminology for the access group type.',
     ),
-  created_at: z
-    .string()
-    .datetime()
-    .describe('Date and time at which the access group was created.'),
+  created_at: datetime.describe(
+    'Date and time at which the access group was created.',
+  ),
   errors: z
     .array(acs_access_group_errors)
     .describe('Errors associated with the `acs_access_group`.'),
diff --git a/src/lib/seam/connect/models/acs/acs-access-groups/pending-mutations.ts b/src/lib/seam/connect/models/acs/acs-access-groups/pending-mutations.ts
index 7a8a619e5..99a1ba471 100644
--- a/src/lib/seam/connect/models/acs/acs-access-groups/pending-mutations.ts
+++ b/src/lib/seam/connect/models/acs/acs-access-groups/pending-mutations.ts
@@ -1,10 +1,11 @@
 import { z } from 'zod'
 
+import { datetime } from '../../datetime.js'
+
 const common_pending_mutation = z.object({
-  created_at: z
-    .string()
-    .datetime()
-    .describe('Date and time at which the mutation was created.'),
+  created_at: datetime.describe(
+    'Date and time at which the mutation was created.',
+  ),
   message: z.string().describe('Detailed description of the mutation.'),
 })
 
@@ -56,14 +57,10 @@ const updating_group_information = common_pending_mutation
 
 const access_schedule = z
   .object({
-    starts_at: z
-      .string()
-      .datetime()
+    starts_at: datetime
       .nullable()
       .describe('Starting time for the access schedule.'),
-    ends_at: z
-      .string()
-      .datetime()
+    ends_at: datetime
       .nullable()
       .describe('Ending time for the access schedule.'),
   })
diff --git a/src/lib/seam/connect/models/acs/acs-credential-pool.ts b/src/lib/seam/connect/models/acs/acs-credential-pool.ts
index 071db4867..3b86fc779 100644
--- a/src/lib/seam/connect/models/acs/acs-credential-pool.ts
+++ b/src/lib/seam/connect/models/acs/acs-credential-pool.ts
@@ -1,5 +1,7 @@
 import { z } from 'zod'
 
+import { datetime } from '../datetime.js'
+
 export const acs_credential_pool_external_type = z.enum(['hid_part_number'])
 
 export type AcsCredentialPoolExternalType = z.infer<
@@ -12,7 +14,7 @@ export const acs_credential_pool = z.object({
   display_name: z.string().min(1),
   external_type: acs_credential_pool_external_type,
   external_type_display_name: z.string(),
-  created_at: z.string().datetime(),
+  created_at: datetime,
   workspace_id: z.string().uuid(),
 }).describe(`
   ---
diff --git a/src/lib/seam/connect/models/acs/acs-credential-provisioning-automation.ts b/src/lib/seam/connect/models/acs/acs-credential-provisioning-automation.ts
index 4a4d61a63..ac5274a09 100644
--- a/src/lib/seam/connect/models/acs/acs-credential-provisioning-automation.ts
+++ b/src/lib/seam/connect/models/acs/acs-credential-provisioning-automation.ts
@@ -1,10 +1,12 @@
 import { z } from 'zod'
 
+import { datetime } from '../datetime.js'
+
 export const acs_credential_provisioning_automation = z.object({
   acs_credential_provisioning_automation_id: z.string().uuid(),
   credential_manager_acs_system_id: z.string().uuid(),
   user_identity_id: z.string().uuid(),
-  created_at: z.string().datetime(),
+  created_at: datetime,
   workspace_id: z.string().uuid(),
 }).describe(`
   ---
@@ -31,10 +33,9 @@ export const enrollment_automation = z.object({
     .describe(
       'ID of the associated [user identity](https://docs.seam.co/capability-guides/mobile-access/managing-mobile-app-user-accounts-with-user-identities#what-is-a-user-identity).',
     ),
-  created_at: z
-    .string()
-    .datetime()
-    .describe('Date and time at which the enrollment automation was created.'),
+  created_at: datetime.describe(
+    'Date and time at which the enrollment automation was created.',
+  ),
   workspace_id: z
     .string()
     .uuid()
diff --git a/src/lib/seam/connect/models/acs/acs-credential.ts b/src/lib/seam/connect/models/acs/acs-credential.ts
index 0310ead1f..e83074f82 100644
--- a/src/lib/seam/connect/models/acs/acs-credential.ts
+++ b/src/lib/seam/connect/models/acs/acs-credential.ts
@@ -1,5 +1,6 @@
 import { z } from 'zod'
 
+import { datetime } from '../datetime.js'
 import {
   acs_credential_akiles_metadata,
   acs_credential_visionline_metadata,
@@ -36,10 +37,9 @@ export type AcsCredentialExternalType = z.infer<
 >
 
 const common_acs_credential_warning = z.object({
-  created_at: z
-    .string()
-    .datetime()
-    .describe('Date and time at which Seam created the warning.'),
+  created_at: datetime.describe(
+    'Date and time at which Seam created the warning.',
+  ),
   message: z
     .string()
     .describe(
@@ -231,9 +231,7 @@ const common_acs_credential = z.object({
     .describe(
       'Indicates whether the [credential](https://docs.seam.co/low-level-apis/access-systems/managing-credentials) has been encoded onto a card.',
     ),
-  issued_at: z
-    .string()
-    .datetime()
+  issued_at: datetime
     .optional()
     .nullable()
     .describe(
@@ -253,12 +251,9 @@ const common_acs_credential = z.object({
     .describe(
       'Display name that corresponds to the brand-specific terminology for the [credential](https://docs.seam.co/low-level-apis/access-systems/managing-credentials) type.',
     ),
-  created_at: z
-    .string()
-    .datetime()
-    .describe(
-      'Date and time at which the [credential](https://docs.seam.co/low-level-apis/access-systems/managing-credentials) was created.',
-    ),
+  created_at: datetime.describe(
+    'Date and time at which the [credential](https://docs.seam.co/low-level-apis/access-systems/managing-credentials) was created.',
+  ),
   workspace_id: z
     .string()
     .uuid()
@@ -282,10 +277,9 @@ const common_acs_credential = z.object({
       z.object({
         error_code: z.string(),
         message: z.string(),
-        created_at: z
-          .string()
-          .datetime()
-          .describe('Date and time at which Seam created the error.'),
+        created_at: datetime.describe(
+          'Date and time at which Seam created the error.',
+        ),
       }),
     )
     .describe(
@@ -309,9 +303,7 @@ const common_acs_credential = z.object({
     .describe(
       'Indicates whether the latest state of the [credential](https://docs.seam.co/low-level-apis/access-systems/managing-credentials) has been synced from Seam to the provider.',
     ),
-  latest_desired_state_synced_with_provider_at: z
-    .string()
-    .datetime()
+  latest_desired_state_synced_with_provider_at: datetime
     .nullable()
     .optional()
     .describe(
@@ -366,9 +358,7 @@ export const unmanaged_acs_credential = common_acs_credential.merge(
 `)
 
 export const acs_credential_on_encoder = z.object({
-  created_at: z
-    .string()
-    .datetime()
+  created_at: datetime
     .nullable()
     .describe(
       'Date and time at which the [credential](https://docs.seam.co/low-level-apis/access-systems/managing-credentials) was created.',
@@ -381,16 +371,12 @@ export const acs_credential_on_encoder = z.object({
       'Indicates whether the credential has been issued (encoded onto a card).',
     ),
 
-  starts_at: z
-    .string()
-    .datetime()
+  starts_at: datetime
     .nullable()
     .describe(
       'Date and time at which the [credential](https://docs.seam.co/low-level-apis/access-systems/managing-credentials) becomes usable.',
     ),
-  ends_at: z
-    .string()
-    .datetime()
+  ends_at: datetime
     .nullable()
     .describe(
       'Date and time at which the [credential](https://docs.seam.co/low-level-apis/access-systems/managing-credentials) will stop being usable.',
diff --git a/src/lib/seam/connect/models/acs/acs-credentials/pending-mutations.ts b/src/lib/seam/connect/models/acs/acs-credentials/pending-mutations.ts
index dd119aa26..921ca662a 100644
--- a/src/lib/seam/connect/models/acs/acs-credentials/pending-mutations.ts
+++ b/src/lib/seam/connect/models/acs/acs-credentials/pending-mutations.ts
@@ -1,10 +1,11 @@
 import { z } from 'zod'
 
+import { datetime } from '../../datetime.js'
+
 const common_pending_mutation = z.object({
-  created_at: z
-    .string()
-    .datetime()
-    .describe('Date and time at which the mutation was created.'),
+  created_at: datetime.describe(
+    'Date and time at which the mutation was created.',
+  ),
   message: z.string().describe('Detailed description of the mutation.'),
 })
 
diff --git a/src/lib/seam/connect/models/acs/acs-encoder.ts b/src/lib/seam/connect/models/acs/acs-encoder.ts
index 69e33c5cf..68c3fbdb3 100644
--- a/src/lib/seam/connect/models/acs/acs-encoder.ts
+++ b/src/lib/seam/connect/models/acs/acs-encoder.ts
@@ -1,10 +1,11 @@
 import { z } from 'zod'
 
+import { datetime } from '../datetime.js'
+
 const common_acs_encoder_error = z.object({
-  created_at: z
-    .string()
-    .datetime()
-    .describe('Date and time at which Seam created the error.'),
+  created_at: datetime.describe(
+    'Date and time at which Seam created the error.',
+  ),
   message: z
     .string()
     .describe(
@@ -65,12 +66,9 @@ export const acs_encoder = z.object({
     .describe(
       'Errors associated with the [encoder](https://docs.seam.co/low-level-apis/access-systems/working-with-card-encoders-and-scanners).',
     ),
-  created_at: z
-    .string()
-    .datetime()
-    .describe(
-      'Date and time at which the [encoder](https://docs.seam.co/low-level-apis/access-systems/working-with-card-encoders-and-scanners) was created.',
-    ),
+  created_at: datetime.describe(
+    'Date and time at which the [encoder](https://docs.seam.co/low-level-apis/access-systems/working-with-card-encoders-and-scanners) was created.',
+  ),
   display_name: z
     .string()
     .describe(
diff --git a/src/lib/seam/connect/models/acs/acs-entrance.ts b/src/lib/seam/connect/models/acs/acs-entrance.ts
index b9e1ce724..4fac31b3a 100644
--- a/src/lib/seam/connect/models/acs/acs-entrance.ts
+++ b/src/lib/seam/connect/models/acs/acs-entrance.ts
@@ -1,5 +1,6 @@
 import { z } from 'zod'
 
+import { datetime } from '../datetime.js'
 import { acs_entrance_akiles_metadata } from './metadata/akiles.js'
 import { acs_entrance_avigilon_alta_metadata } from './metadata/avigilon-alta.js'
 import { acs_entrance_dormakaba_ambiance_metadata } from './metadata/dormakaba-ambiance.js'
@@ -18,10 +19,9 @@ const warning_code_description =
   'Unique identifier of the type of warning. Enables quick recognition and categorization of the issue.'
 
 const common_acs_entrance_warning = z.object({
-  created_at: z
-    .string()
-    .datetime()
-    .describe('Date and time at which Seam created the warning.'),
+  created_at: datetime.describe(
+    'Date and time at which Seam created the warning.',
+  ),
   message: z
     .string()
     .describe(
@@ -152,12 +152,9 @@ export const acs_entrance = z
     space_ids: z
       .array(z.string().uuid())
       .describe('IDs of the spaces that the entrance is in.'),
-    created_at: z
-      .string()
-      .datetime()
-      .describe(
-        'Date and time at which the [entrance](https://docs.seam.co/low-level-apis/access-systems/retrieving-entrance-details) was created.',
-      ),
+    created_at: datetime.describe(
+      'Date and time at which the [entrance](https://docs.seam.co/low-level-apis/access-systems/retrieving-entrance-details) was created.',
+    ),
     display_name: z
       .string()
       .describe(
@@ -182,10 +179,9 @@ export const acs_entrance = z
             .describe(
               'Detailed description of the error. Provides insights into the issue and potentially how to rectify it.',
             ),
-          created_at: z
-            .string()
-            .datetime()
-            .describe('Date and time at which Seam created the error.'),
+          created_at: datetime.describe(
+            'Date and time at which Seam created the error.',
+          ),
         }),
       )
       .describe(
diff --git a/src/lib/seam/connect/models/acs/acs-system.ts b/src/lib/seam/connect/models/acs/acs-system.ts
index 620183853..7b64e0b59 100644
--- a/src/lib/seam/connect/models/acs/acs-system.ts
+++ b/src/lib/seam/connect/models/acs/acs-system.ts
@@ -1,5 +1,7 @@
 import { z } from 'zod'
 
+import { datetime } from '../datetime.js'
+
 export const acs_system_capability_flags = z.object({
   // Access method type capability flags are not publicly exposed for ACS systems
   // They are only available for ACS entrances
@@ -38,10 +40,9 @@ export const acs_system_external_type = z.enum([
 export type AcsSystemExternalType = z.infer<typeof acs_system_external_type>
 
 const common_acs_system_error = z.object({
-  created_at: z
-    .string()
-    .datetime()
-    .describe('Date and time at which Seam created the error.'),
+  created_at: datetime.describe(
+    'Date and time at which Seam created the error.',
+  ),
   message: z
     .string()
     .describe(
@@ -200,10 +201,9 @@ const _acs_system_error_map = z.object({
 export type AcsSystemErrorMap = z.infer<typeof _acs_system_error_map>
 
 const common_acs_system_warning = z.object({
-  created_at: z
-    .string()
-    .datetime()
-    .describe('Date and time at which Seam created the warning.'),
+  created_at: datetime.describe(
+    'Date and time at which Seam created the warning.',
+  ),
   message: z
     .string()
     .describe(
@@ -377,12 +377,9 @@ export const acs_system = z
       .describe(
         'Name of the [access control system](https://docs.seam.co/low-level-apis/access-systems).',
       ),
-    created_at: z
-      .string()
-      .datetime()
-      .describe(
-        'Date and time at which the [access control system](https://docs.seam.co/low-level-apis/access-systems) was created.',
-      ),
+    created_at: datetime.describe(
+      'Date and time at which the [access control system](https://docs.seam.co/low-level-apis/access-systems) was created.',
+    ),
     workspace_id: z
       .string()
       .uuid()
diff --git a/src/lib/seam/connect/models/acs/acs-users/acs-user.ts b/src/lib/seam/connect/models/acs/acs-users/acs-user.ts
index 5c54bc2f0..839b9735e 100644
--- a/src/lib/seam/connect/models/acs/acs-users/acs-user.ts
+++ b/src/lib/seam/connect/models/acs/acs-users/acs-user.ts
@@ -1,5 +1,6 @@
 import { z } from 'zod'
 
+import { datetime } from '../../datetime.js'
 import { loose_phone_number } from '../../phone-number.js'
 import { schedule } from '../../schedule.js'
 import { acs_user_salto_ks_metadata } from '../metadata/salto.js'
@@ -21,10 +22,9 @@ export const acs_user_external_type = z.enum([
 export type AcsUserExternalType = z.infer<typeof acs_user_external_type>
 
 const common_acs_user_error = z.object({
-  created_at: z
-    .string()
-    .datetime()
-    .describe('Date and time at which Seam created the error.'),
+  created_at: datetime.describe(
+    'Date and time at which Seam created the error.',
+  ),
   message: z
     .string()
     .describe(
@@ -122,10 +122,9 @@ const _acs_users_error_map = z.object({
 export type AcsUsersErrorMap = z.infer<typeof _acs_users_error_map>
 
 const common_acs_user_warning = z.object({
-  created_at: z
-    .string()
-    .datetime()
-    .describe('Date and time at which Seam created the warning.'),
+  created_at: datetime.describe(
+    'Date and time at which Seam created the warning.',
+  ),
   message: z
     .string()
     .describe(
@@ -254,12 +253,9 @@ const common_acs_user = z
       .describe(
         'ID of the workspace that contains the [access system user](https://docs.seam.co/low-level-apis/access-systems/user-management).',
       ),
-    created_at: z
-      .string()
-      .datetime()
-      .describe(
-        'Date and time at which the [access system user](https://docs.seam.co/low-level-apis/access-systems/user-management) was created.',
-      ),
+    created_at: datetime.describe(
+      'Date and time at which the [access system user](https://docs.seam.co/low-level-apis/access-systems/user-management) was created.',
+    ),
     display_name: z
       .string()
       .describe(
@@ -330,7 +326,7 @@ const common_acs_user = z
       .describe(
         'Pending mutations associated with the [access system user](https://docs.seam.co/low-level-apis/access-systems/user-management). Seam is in the process of pushing these mutations to the integrated access system.',
       ),
-    last_successful_sync_at: z.string().datetime().nullable().describe(`
+    last_successful_sync_at: datetime.nullable().describe(`
         ---
         undocumented: Only used internally.
         ---
diff --git a/src/lib/seam/connect/models/acs/acs-users/pending-mutations.ts b/src/lib/seam/connect/models/acs/acs-users/pending-mutations.ts
index bdd0c68fd..665bc22a6 100644
--- a/src/lib/seam/connect/models/acs/acs-users/pending-mutations.ts
+++ b/src/lib/seam/connect/models/acs/acs-users/pending-mutations.ts
@@ -1,12 +1,12 @@
 import { z } from 'zod'
 
+import { datetime } from '../../datetime.js'
 import { loose_phone_number } from '../../phone-number.js'
 
 const common_pending_mutation = z.object({
-  created_at: z
-    .string()
-    .datetime()
-    .describe('Date and time at which the mutation was created.'),
+  created_at: datetime.describe(
+    'Date and time at which the mutation was created.',
+  ),
   message: z.string().describe('Detailed description of the mutation.'),
 })
 
@@ -41,9 +41,7 @@ const deferring_creation = common_pending_mutation
       .describe(
         'Mutation code to indicate that Seam is intentionally deferring the creation of the user on the access control system until the appropriate time.',
       ),
-    scheduled_at: z
-      .string()
-      .datetime()
+    scheduled_at: datetime
       .optional()
       .nullable()
       .describe('Optional: When the user creation is scheduled to occur.'),
@@ -83,14 +81,10 @@ export const updating_user_information_mutation =
 
 const access_schedule = z
   .object({
-    starts_at: z
-      .string()
-      .datetime()
+    starts_at: datetime
       .nullable()
       .describe('Starting time for the access schedule.'),
-    ends_at: z
-      .string()
-      .datetime()
+    ends_at: datetime
       .nullable()
       .describe('Starting time for the access schedule.'),
   })
diff --git a/src/lib/seam/connect/models/bridges/bridge-client-session.ts b/src/lib/seam/connect/models/bridges/bridge-client-session.ts
index 261728245..68f8c1f34 100644
--- a/src/lib/seam/connect/models/bridges/bridge-client-session.ts
+++ b/src/lib/seam/connect/models/bridges/bridge-client-session.ts
@@ -1,15 +1,16 @@
 import { z } from 'zod'
 
+import { datetime } from '../datetime.js'
+
 const common_bridge_client_session_error = z.object({
   message: z
     .string()
     .describe(
       'Detailed description of the error. Provides insights into the issue and potentially how to rectify it.',
     ),
-  created_at: z
-    .string()
-    .datetime()
-    .describe('Date and time at which Seam created the error.'),
+  created_at: datetime.describe(
+    'Date and time at which Seam created the error.',
+  ),
 })
 
 const error_code_description =
@@ -89,12 +90,9 @@ export type BridgeClientSessionErrorMap = z.infer<
 >
 
 export const bridge_client_session = z.object({
-  created_at: z
-    .string()
-    .datetime()
-    .describe(
-      'Date and time at which the Seam Bridge client session was created.',
-    ),
+  created_at: datetime.describe(
+    'Date and time at which the Seam Bridge client session was created.',
+  ),
   bridge_client_session_id: z
     .string()
     .uuid()
@@ -110,10 +108,9 @@ export const bridge_client_session = z.object({
     .describe(
       'Pairing code for Seam Bridge. Use this code to pair Seam Bridge with your workspace.',
     ),
-  pairing_code_expires_at: z
-    .string()
-    .datetime()
-    .describe('Date and time at which the pairing code expires.'),
+  pairing_code_expires_at: datetime.describe(
+    'Date and time at which the pairing code expires.',
+  ),
   tailscale_hostname: z
     .string()
     .describe('Tailscale hostname for Seam Bridge.'),
@@ -137,9 +134,7 @@ export const bridge_client_session = z.object({
     .string()
     .nullable()
     .describe('Telemetry token for the Seam Bridge client session.'),
-  telemetry_token_expires_at: z
-    .string()
-    .datetime()
+  telemetry_token_expires_at: datetime
     .nullable()
     .describe(
       'Date and time at which the telemetry token for the Seam Bridge client session expires.',
diff --git a/src/lib/seam/connect/models/bridges/bridge-connected-system.ts b/src/lib/seam/connect/models/bridges/bridge-connected-system.ts
index 49bfb099e..73b193030 100644
--- a/src/lib/seam/connect/models/bridges/bridge-connected-system.ts
+++ b/src/lib/seam/connect/models/bridges/bridge-connected-system.ts
@@ -1,24 +1,22 @@
 import { z } from 'zod'
 
+import { datetime } from '../datetime.js'
+
 export const bridge_connected_system = z.object({
   bridge_id: z
     .string()
     .uuid()
     .describe('ID of Seam Bridge connected to the access system.'),
-  bridge_created_at: z
-    .string()
-    .datetime()
-    .describe('Date and time at which Seam Bridge was created.'),
+  bridge_created_at: datetime.describe(
+    'Date and time at which Seam Bridge was created.',
+  ),
   connected_account_id: z
     .string()
     .uuid()
     .describe('ID of the connected account associated with Seam Bridge.'),
-  connected_account_created_at: z
-    .string()
-    .datetime()
-    .describe(
-      'Date and time at which the connected account associated with Seam Bridge was created.',
-    ),
+  connected_account_created_at: datetime.describe(
+    'Date and time at which the connected account associated with Seam Bridge was created.',
+  ),
   acs_system_id: z
     .string()
     .uuid()
diff --git a/src/lib/seam/connect/models/bridges/bridge.ts b/src/lib/seam/connect/models/bridges/bridge.ts
index c7beb0027..520349dc6 100644
--- a/src/lib/seam/connect/models/bridges/bridge.ts
+++ b/src/lib/seam/connect/models/bridges/bridge.ts
@@ -1,15 +1,16 @@
 import { z } from 'zod'
 
+import { datetime } from '../datetime.js'
+
 export const bridge = z.object({
   bridge_id: z.string().uuid().describe('ID of Seam Bridge.'),
   workspace_id: z
     .string()
     .uuid()
     .describe('ID of the workspace that contains Seam Bridge.'),
-  created_at: z
-    .string()
-    .datetime()
-    .describe('Date and time at which Seam Bridge was created.'),
+  created_at: datetime.describe(
+    'Date and time at which Seam Bridge was created.',
+  ),
 }).describe(`
 ---
 undocumented: Unreleased.
diff --git a/src/lib/seam/connect/models/client-sessions/client-session.ts b/src/lib/seam/connect/models/client-sessions/client-session.ts
index 5b369e8f1..098549820 100644
--- a/src/lib/seam/connect/models/client-sessions/client-session.ts
+++ b/src/lib/seam/connect/models/client-sessions/client-session.ts
@@ -1,23 +1,19 @@
 import { z } from 'zod'
 
+import { datetime } from '../datetime.js'
+
 export const client_session = z.object({
   client_session_id: z.string().uuid().describe('ID of the client session.'),
   workspace_id: z
     .string()
     .uuid()
     .describe('ID of the workspace associated with the client session.'),
-  created_at: z
-    .string()
-    .datetime()
-    .describe(
-      'Date and time at which the [client session](https://docs.seam.co/core-concepts/authentication/client-session-tokens) was created.',
-    ),
-  expires_at: z
-    .string()
-    .datetime()
-    .describe(
-      'Date and time at which the [client session](https://docs.seam.co/core-concepts/authentication/client-session-tokens) expires.',
-    ),
+  created_at: datetime.describe(
+    'Date and time at which the [client session](https://docs.seam.co/core-concepts/authentication/client-session-tokens) was created.',
+  ),
+  expires_at: datetime.describe(
+    'Date and time at which the [client session](https://docs.seam.co/core-concepts/authentication/client-session-tokens) expires.',
+  ),
   token: z
     .string()
     .describe(
diff --git a/src/lib/seam/connect/models/connect-webviews/connect-webview.ts b/src/lib/seam/connect/models/connect-webviews/connect-webview.ts
index 88f708484..dc617ae3d 100644
--- a/src/lib/seam/connect/models/connect-webviews/connect-webview.ts
+++ b/src/lib/seam/connect/models/connect-webviews/connect-webview.ts
@@ -1,6 +1,7 @@
 import { z } from 'zod'
 
 import { custom_metadata } from '../custom-metadata.js'
+import { datetime } from '../datetime.js'
 import { provider_capability } from '../provider-capability.js'
 
 export const connect_webview_device_selection_mode = z.enum([
@@ -15,10 +16,9 @@ export const connect_webview = z.object({
     .string()
     .uuid()
     .describe('ID of the workspace that contains the Connect Webview.'),
-  created_at: z
-    .string()
-    .datetime()
-    .describe('Date and time at which the Connect Webview was created.'),
+  created_at: datetime.describe(
+    'Date and time at which the Connect Webview was created.',
+  ),
   connected_account_id: z
     .string()
     .uuid()
@@ -104,9 +104,7 @@ export const connect_webview = z.object({
     .describe(
       'Indicates whether Seam should [finish syncing all devices](https://docs.seam.co/core-concepts/connect-webviews/customizing-connect-webviews#wait_for_device_creation) in a newly-connected account before completing the associated Connect Webview.',
     ),
-  authorized_at: z
-    .string()
-    .datetime()
+  authorized_at: datetime
     .nullable()
     .describe(
       'Date and time at which the user authorized (through the Connect Webview) the management of their devices.',
diff --git a/src/lib/seam/connect/models/connected-accounts/connected-account.ts b/src/lib/seam/connect/models/connected-accounts/connected-account.ts
index 40541bfe4..8bdf27e84 100644
--- a/src/lib/seam/connect/models/connected-accounts/connected-account.ts
+++ b/src/lib/seam/connect/models/connected-accounts/connected-account.ts
@@ -1,13 +1,13 @@
 import { z } from 'zod'
 
 import { custom_metadata } from '../custom-metadata.js'
+import { datetime } from '../datetime.js'
 import { provider_capability } from '../provider-capability.js'
 
 const common_connected_account_error = z.object({
-  created_at: z
-    .string()
-    .datetime()
-    .describe('Date and time at which Seam created the error.'),
+  created_at: datetime.describe(
+    'Date and time at which Seam created the error.',
+  ),
   message: z
     .string()
     .describe(
@@ -34,10 +34,9 @@ const warning_code_description =
   'Unique identifier of the type of warning. Enables quick recognition and categorization of the issue.'
 
 const common_connected_account_warning = z.object({
-  created_at: z
-    .string()
-    .datetime()
-    .describe('Date and time at which Seam created the warning.'),
+  created_at: datetime.describe(
+    'Date and time at which Seam created the warning.',
+  ),
   message: z
     .string()
     .describe(
@@ -335,9 +334,7 @@ export const connected_account = z.object({
     .string()
     .uuid()
     .describe('ID of the connected account.'),
-  created_at: z
-    .string()
-    .datetime()
+  created_at: datetime
     .optional()
     .describe('Date and time at which the connected account was created.'),
   user_identifier: z
diff --git a/src/lib/seam/connect/models/customer/access-grant-resources.ts b/src/lib/seam/connect/models/customer/access-grant-resources.ts
index 82ad500cb..f43efe9ac 100644
--- a/src/lib/seam/connect/models/customer/access-grant-resources.ts
+++ b/src/lib/seam/connect/models/customer/access-grant-resources.ts
@@ -1,6 +1,7 @@
 import { z } from 'zod'
 
 import { custom_metadata_input } from '../custom-metadata.js'
+import { datetime } from '../datetime.js'
 
 // Base access grant resource with common fields
 const base_access_grant_resource = z.object({
@@ -8,14 +9,10 @@ const base_access_grant_resource = z.object({
     .string()
     .optional()
     .describe('Your name for this access grant resource.'),
-  starts_at: z
-    .string()
-    .datetime()
+  starts_at: datetime
     .optional()
     .describe('Starting date and time for the access grant.'),
-  ends_at: z
-    .string()
-    .datetime()
+  ends_at: datetime
     .optional()
     .describe('Ending date and time for the access grant.'),
   preferred_code: z
diff --git a/src/lib/seam/connect/models/customer/customer.ts b/src/lib/seam/connect/models/customer/customer.ts
index 156baeb68..f56d937bb 100644
--- a/src/lib/seam/connect/models/customer/customer.ts
+++ b/src/lib/seam/connect/models/customer/customer.ts
@@ -1,5 +1,7 @@
 import { z } from 'zod'
 
+import { datetime } from '../datetime.js'
+
 export const customer = z.object({
   customer_key: z
     .string()
@@ -8,10 +10,9 @@ export const customer = z.object({
     .string()
     .uuid()
     .describe('ID of the workspace associated with the customer.'),
-  created_at: z
-    .string()
-    .datetime()
-    .describe('Date and time at which the customer was created.'),
+  created_at: datetime.describe(
+    'Date and time at which the customer was created.',
+  ),
 }).describe(`
   ---
   route_path: /customers
diff --git a/src/lib/seam/connect/models/customization-profiles/customization-profile.ts b/src/lib/seam/connect/models/customization-profiles/customization-profile.ts
index e50d3266a..2b13acb18 100644
--- a/src/lib/seam/connect/models/customization-profiles/customization-profile.ts
+++ b/src/lib/seam/connect/models/customization-profiles/customization-profile.ts
@@ -1,6 +1,7 @@
 import { z } from 'zod'
 
 import { hex_color_code } from '../colors.js'
+import { datetime } from '../datetime.js'
 
 export const customer_portal_theme = z.object({
   primary_color: hex_color_code.optional(),
@@ -23,7 +24,7 @@ export const customization_profile = z.object({
   workspace_id: z.string().uuid(),
   name: z.string().nullable(),
   customization_profile_id: z.string().uuid(),
-  created_at: z.string().datetime(),
+  created_at: datetime,
   logo_url: z.string().url().optional(),
   primary_color: z.string().optional(),
   secondary_color: z.string().optional(),
diff --git a/src/lib/seam/connect/models/datetime.ts b/src/lib/seam/connect/models/datetime.ts
new file mode 100644
index 000000000..7b2e95a4e
--- /dev/null
+++ b/src/lib/seam/connect/models/datetime.ts
@@ -0,0 +1,3 @@
+import { z } from 'zod'
+
+export const datetime = z.string().datetime({ offset: true })
diff --git a/src/lib/seam/connect/models/devices/device.ts b/src/lib/seam/connect/models/devices/device.ts
index d06c328a3..81f124c79 100644
--- a/src/lib/seam/connect/models/devices/device.ts
+++ b/src/lib/seam/connect/models/devices/device.ts
@@ -2,6 +2,7 @@ import { z } from 'zod'
 
 import { connected_account_error } from '../connected-accounts/index.js'
 import { custom_metadata } from '../custom-metadata.js'
+import { datetime } from '../datetime.js'
 import { capabilities } from './capabilities-supported.js'
 import { capability_properties } from './capability-properties/index.js'
 import { device_metadata } from './device-metadata.js'
@@ -118,10 +119,9 @@ const common_device_error = z.object({
   is_device_error: z
     .literal(true)
     .describe('Indicates that the error is a device error.'),
-  created_at: z
-    .string()
-    .datetime()
-    .describe('Date and time at which Seam created the error.'),
+  created_at: datetime.describe(
+    'Date and time at which Seam created the error.',
+  ),
 })
 
 const error_code_description =
@@ -357,10 +357,9 @@ const common_device_warning = z.object({
     .describe(
       'Detailed description of the warning. Provides insights into the issue and potentially how to rectify it.',
     ),
-  created_at: z
-    .string()
-    .datetime()
-    .describe('Date and time at which Seam created the warning.'),
+  created_at: datetime.describe(
+    'Date and time at which Seam created the warning.',
+  ),
 })
 
 const partial_backup_access_code_pool = common_device_warning.extend({
@@ -1149,10 +1148,9 @@ export const device = z
         ---
         Array of warnings associated with the device. Each warning object within the array contains two fields: \`warning_code\` and \`message\`. \`warning_code\` is a string that uniquely identifies the type of warning, enabling quick recognition and categorization of the issue. \`message\` provides a more detailed description of the warning, offering insights into the issue and potentially how to rectify it.
       `),
-    created_at: z
-      .string()
-      .datetime()
-      .describe('Date and time at which the device object was created.'),
+    created_at: datetime.describe(
+      'Date and time at which the device object was created.',
+    ),
     is_managed: z
       .literal(true)
       .describe(
diff --git a/src/lib/seam/connect/models/devices/phone.ts b/src/lib/seam/connect/models/devices/phone.ts
index cc7edc05e..c3ffe46fb 100644
--- a/src/lib/seam/connect/models/devices/phone.ts
+++ b/src/lib/seam/connect/models/devices/phone.ts
@@ -1,5 +1,6 @@
 import { z } from 'zod'
 
+import { datetime } from '../datetime.js'
 import { device } from './device.js'
 import { phone_device_type } from './device-type.js'
 import { phone_specific_properties } from './phone-properties.js'
@@ -41,10 +42,9 @@ export const phone = z.object({
           .string()
           .describe('Unique identifier of the type of error.'),
         message: z.string().describe('Detailed description of the error.'),
-        created_at: z
-          .string()
-          .datetime()
-          .describe('Date and time at which Seam created the error.'),
+        created_at: datetime.describe(
+          'Date and time at which Seam created the error.',
+        ),
       }),
     )
     .describe('Errors associated with the phone.'),
@@ -55,10 +55,9 @@ export const phone = z.object({
           .string()
           .describe('Unique identifier of the type of warning.'),
         message: z.string().describe('Detailed description of the warning.'),
-        created_at: z
-          .string()
-          .datetime()
-          .describe('Date and time at which Seam created the warning.'),
+        created_at: datetime.describe(
+          'Date and time at which Seam created the warning.',
+        ),
       }),
     )
     .describe('Warnings associated with the phone.'),
diff --git a/src/lib/seam/connect/models/events/common.ts b/src/lib/seam/connect/models/events/common.ts
index de1ea9287..47305a6f2 100644
--- a/src/lib/seam/connect/models/events/common.ts
+++ b/src/lib/seam/connect/models/events/common.ts
@@ -1,19 +1,17 @@
 import { z } from 'zod'
 
+import { datetime } from '../datetime.js'
+
 export const common_event = z.object({
   event_id: z.string().uuid().describe('ID of the event.'),
   workspace_id: z
     .string()
     .uuid()
     .describe('ID of the workspace associated with the event.'),
-  created_at: z
-    .string()
-    .datetime()
-    .describe('Date and time at which the event was created.'),
-  occurred_at: z
-    .string()
-    .datetime()
-    .describe('Date and time at which the event occurred.'),
+  created_at: datetime.describe(
+    'Date and time at which the event was created.',
+  ),
+  occurred_at: datetime.describe('Date and time at which the event occurred.'),
   event_description: z
     .string()
     .optional()
@@ -29,10 +27,9 @@ const warning_code_description =
 
 export const common_event_error = z
   .object({
-    created_at: z
-      .string()
-      .datetime()
-      .describe('Date and time at which Seam created the error.'),
+    created_at: datetime.describe(
+      'Date and time at which Seam created the error.',
+    ),
     message: z
       .string()
       .describe(
@@ -46,10 +43,9 @@ export const common_event_error = z
 
 export const common_event_warning = z
   .object({
-    created_at: z
-      .string()
-      .datetime()
-      .describe('Date and time at which Seam created the warning.'),
+    created_at: datetime.describe(
+      'Date and time at which Seam created the warning.',
+    ),
     message: z
       .string()
       .describe(
diff --git a/src/lib/seam/connect/models/index.ts b/src/lib/seam/connect/models/index.ts
index 1bb4f7f91..34511d465 100644
--- a/src/lib/seam/connect/models/index.ts
+++ b/src/lib/seam/connect/models/index.ts
@@ -15,6 +15,7 @@ export * from './customer/index.js'
 export * from './customer/location-resources.js'
 export * from './customer/user-identity-resources.js'
 export * from './customization-profiles/index.js'
+export * from './datetime.js'
 export * from './devices/index.js'
 export * from './events/index.js'
 export * from './instant-keys/index.js'
diff --git a/src/lib/seam/connect/models/instant-keys/instant-key.ts b/src/lib/seam/connect/models/instant-keys/instant-key.ts
index e0da2cf72..3f91793ab 100644
--- a/src/lib/seam/connect/models/instant-keys/instant-key.ts
+++ b/src/lib/seam/connect/models/instant-keys/instant-key.ts
@@ -1,15 +1,16 @@
 import { z } from 'zod'
 
+import { datetime } from '../datetime.js'
+
 export const instant_key = z.object({
   instant_key_id: z.string().uuid().describe('ID of the Instant Key.'),
   workspace_id: z
     .string()
     .uuid()
     .describe('ID of the workspace that contains the Instant Key.'),
-  created_at: z
-    .string()
-    .datetime()
-    .describe('Date and time at which the Instant Key was created.'),
+  created_at: datetime.describe(
+    'Date and time at which the Instant Key was created.',
+  ),
   instant_key_url: z
     .string()
     .url()
@@ -24,10 +25,9 @@ export const instant_key = z.object({
     .string()
     .uuid()
     .describe('ID of the user identity associated with the Instant Key.'),
-  expires_at: z
-    .string()
-    .datetime()
-    .describe('Date and time at which the Instant Key expires.'),
+  expires_at: datetime.describe(
+    'Date and time at which the Instant Key expires.',
+  ),
   customization_profile_id: z
     .string()
     .uuid()
diff --git a/src/lib/seam/connect/models/partner/customer-portal.ts b/src/lib/seam/connect/models/partner/customer-portal.ts
index 822e5f0ef..b469f22e8 100644
--- a/src/lib/seam/connect/models/partner/customer-portal.ts
+++ b/src/lib/seam/connect/models/partner/customer-portal.ts
@@ -1,21 +1,21 @@
 import { z } from 'zod'
 
+import { datetime } from '../datetime.js'
+
 export const customer_portal = z
   .object({
     url: z.string().url().describe('URL for the customer portal.'),
     customer_key: z.string().describe('Customer key for the customer portal.'),
-    expires_at: z
-      .string()
-      .datetime()
-      .describe('Date and time at which the customer portal link expires.'),
+    expires_at: datetime.describe(
+      'Date and time at which the customer portal link expires.',
+    ),
     workspace_id: z
       .string()
       .uuid()
       .describe('ID of the workspace associated with the customer portal.'),
-    created_at: z
-      .string()
-      .datetime()
-      .describe('Date and time at which the customer portal link was created.'),
+    created_at: datetime.describe(
+      'Date and time at which the customer portal link was created.',
+    ),
   })
   .describe(
     `
diff --git a/src/lib/seam/connect/models/partner/magic-link.ts b/src/lib/seam/connect/models/partner/magic-link.ts
index c95bd41cb..c2a51c45a 100644
--- a/src/lib/seam/connect/models/partner/magic-link.ts
+++ b/src/lib/seam/connect/models/partner/magic-link.ts
@@ -1,20 +1,20 @@
 import { z } from 'zod'
 
+import { datetime } from '../datetime.js'
+
 export const magic_link = z.object({
   url: z.string().url().describe('URL for the magic link.'),
   customer_key: z.string().describe('Customer key for the magic link.'),
-  expires_at: z
-    .string()
-    .datetime()
-    .describe('Date and time at which the magic link expires.'),
+  expires_at: datetime.describe(
+    'Date and time at which the magic link expires.',
+  ),
   workspace_id: z
     .string()
     .uuid()
     .describe('ID of the workspace associated with the magic link.'),
-  created_at: z
-    .string()
-    .datetime()
-    .describe('Date and time at which the magic link was created.'),
+  created_at: datetime.describe(
+    'Date and time at which the magic link was created.',
+  ),
 }).describe(`
   ---
   undocumented: Unreleased.
diff --git a/src/lib/seam/connect/models/schedule.ts b/src/lib/seam/connect/models/schedule.ts
index a83193a13..b5f1b49bd 100644
--- a/src/lib/seam/connect/models/schedule.ts
+++ b/src/lib/seam/connect/models/schedule.ts
@@ -1,16 +1,13 @@
 import { z } from 'zod'
 
+import { datetime } from './datetime.js'
+
 export const start_end_schedule = z
   .object({
-    starts_at: z
-      .string()
-      .datetime()
-      .describe(
-        "Date and time at which the user's access starts, in [ISO 8601](https://www.iso.org/iso-8601-date-and-time-format.html) format.",
-      ),
-    ends_at: z
-      .string()
-      .datetime()
+    starts_at: datetime.describe(
+      "Date and time at which the user's access starts, in [ISO 8601](https://www.iso.org/iso-8601-date-and-time-format.html) format.",
+    ),
+    ends_at: datetime
       .describe(
         "Date and time at which the user's access ends, in [ISO 8601](https://www.iso.org/iso-8601-date-and-time-format.html) format.",
       )
diff --git a/src/lib/seam/connect/models/spaces/space.ts b/src/lib/seam/connect/models/spaces/space.ts
index 0c702f8d6..21b25df98 100644
--- a/src/lib/seam/connect/models/spaces/space.ts
+++ b/src/lib/seam/connect/models/spaces/space.ts
@@ -1,5 +1,7 @@
 import { z } from 'zod'
 
+import { datetime } from '../datetime.js'
+
 const time_of_day_re = /^([01]\d|2[0-3]):[0-5]\d(:[0-5]\d)?$/
 
 export const space_customer_data = z
@@ -47,10 +49,9 @@ export const space = z.object({
     .describe('Unique key for the space within the workspace.'),
   name: z.string().describe('Name of the space.'),
   display_name: z.string().describe('Display name for the space.'),
-  created_at: z
-    .string()
-    .datetime()
-    .describe('Date and time at which the space was created.'),
+  created_at: datetime.describe(
+    'Date and time at which the space was created.',
+  ),
   device_count: z.number().describe('Number of devices in the space.'),
   acs_entrance_count: z.number().describe('Number of entrances in the space.'),
   customer_key: z
diff --git a/src/lib/seam/connect/models/thermostats/thermostat-program.ts b/src/lib/seam/connect/models/thermostats/thermostat-program.ts
index 888f00506..43fa109dc 100644
--- a/src/lib/seam/connect/models/thermostats/thermostat-program.ts
+++ b/src/lib/seam/connect/models/thermostats/thermostat-program.ts
@@ -1,5 +1,7 @@
 import { z } from 'zod'
 
+import { datetime } from '../datetime.js'
+
 export const thermostat_daily_program_period = z
   .object({
     starts_at_time: z
@@ -42,12 +44,9 @@ export const thermostat_daily_program = z.object({
     .describe(
       'ID of the workspace that contains the thermostat daily program.',
     ),
-  created_at: z
-    .string()
-    .datetime()
-    .describe(
-      'Date and time at which the thermostat daily program was created.',
-    ),
+  created_at: datetime.describe(
+    'Date and time at which the thermostat daily program was created.',
+  ),
 }).describe(`
   ---
   route_path: /thermostats/daily_programs
@@ -91,12 +90,9 @@ export const thermostat_weekly_program = z.object({
     .uuid()
     .nullable()
     .describe('ID of the thermostat daily program to run on Sundays.'),
-  created_at: z
-    .string()
-    .datetime()
-    .describe(
-      'Date and time at which the thermostat weekly program was created.',
-    ),
+  created_at: datetime.describe(
+    'Date and time at which the thermostat weekly program was created.',
+  ),
 })
 
 export type ThermostatDailyProgram = z.infer<typeof thermostat_daily_program>
diff --git a/src/lib/seam/connect/models/thermostats/thermostat-schedule.ts b/src/lib/seam/connect/models/thermostats/thermostat-schedule.ts
index 71588fe46..9e14af6e3 100644
--- a/src/lib/seam/connect/models/thermostats/thermostat-schedule.ts
+++ b/src/lib/seam/connect/models/thermostats/thermostat-schedule.ts
@@ -1,5 +1,7 @@
 import { z } from 'zod'
 
+import { datetime } from '../datetime.js'
+
 export const thermostat_schedule = z.object({
   thermostat_schedule_id: z
     .string()
@@ -33,34 +35,25 @@ export const thermostat_schedule = z.object({
     .describe(
       "Number of minutes for which a person at the thermostat can change the thermostat's settings after the activation of the scheduled [climate preset](https://docs.seam.co/capability-guides/thermostats/creating-and-managing-climate-presets). See also [Specifying Manual Override Permissions](https://docs.seam.co/capability-guides/thermostats/creating-and-managing-thermostat-schedules#specifying-manual-override-permissions).",
     ),
-  starts_at: z
-    .string()
-    .datetime()
-    .describe(
-      'Date and time at which the [thermostat schedule](https://docs.seam.co/capability-guides/thermostats/creating-and-managing-thermostat-schedules) starts, in [ISO 8601](https://www.iso.org/iso-8601-date-and-time-format.html) format.',
-    ),
+  starts_at: datetime.describe(
+    'Date and time at which the [thermostat schedule](https://docs.seam.co/capability-guides/thermostats/creating-and-managing-thermostat-schedules) starts, in [ISO 8601](https://www.iso.org/iso-8601-date-and-time-format.html) format.',
+  ),
   is_override_allowed: z
     .boolean()
     .optional()
     .describe(
       "Indicates whether a person at the thermostat can change the thermostat's settings after the [thermostat schedule](https://docs.seam.co/capability-guides/thermostats/creating-and-managing-thermostat-schedules) starts.",
     ),
-  ends_at: z
-    .string()
-    .datetime()
-    .describe(
-      'Date and time at which the [thermostat schedule](https://docs.seam.co/capability-guides/thermostats/creating-and-managing-thermostat-schedules) ends, in [ISO 8601](https://www.iso.org/iso-8601-date-and-time-format.html) format.',
-    ),
+  ends_at: datetime.describe(
+    'Date and time at which the [thermostat schedule](https://docs.seam.co/capability-guides/thermostats/creating-and-managing-thermostat-schedules) ends, in [ISO 8601](https://www.iso.org/iso-8601-date-and-time-format.html) format.',
+  ),
   workspace_id: z
     .string()
     .uuid()
     .describe('ID of the workspace that contains the thermostat schedule.'),
-  created_at: z
-    .string()
-    .datetime()
-    .describe(
-      'Date and time at which the [thermostat schedule](https://docs.seam.co/capability-guides/thermostats/creating-and-managing-thermostat-schedules) was created.',
-    ),
+  created_at: datetime.describe(
+    'Date and time at which the [thermostat schedule](https://docs.seam.co/capability-guides/thermostats/creating-and-managing-thermostat-schedules) was created.',
+  ),
   errors: z
     .array(
       z.object({
@@ -74,10 +67,9 @@ export const thermostat_schedule = z.object({
           .describe(
             'Detailed description of the error. Provides insights into the issue and potentially how to rectify it.',
           ),
-        created_at: z
-          .string()
-          .datetime()
-          .describe('Date and time at which Seam created the error.'),
+        created_at: datetime.describe(
+          'Date and time at which Seam created the error.',
+        ),
       }),
     )
     .describe(
diff --git a/src/lib/seam/connect/models/user-identities/user-identity.ts b/src/lib/seam/connect/models/user-identities/user-identity.ts
index f090dbf2c..19e145e28 100644
--- a/src/lib/seam/connect/models/user-identities/user-identity.ts
+++ b/src/lib/seam/connect/models/user-identities/user-identity.ts
@@ -1,12 +1,12 @@
 import { z } from 'zod'
 
+import { datetime } from '../datetime.js'
 import { loose_phone_number } from '../phone-number.js'
 
 const common_user_identity_error = z.object({
-  created_at: z
-    .string()
-    .datetime()
-    .describe('Date and time at which Seam created the error.'),
+  created_at: datetime.describe(
+    'Date and time at which Seam created the error.',
+  ),
   message: z
     .string()
     .describe(
@@ -15,10 +15,9 @@ const common_user_identity_error = z.object({
 })
 
 const common_user_identity_warning = z.object({
-  created_at: z
-    .string()
-    .datetime()
-    .describe('Date and time at which Seam created the warning.'),
+  created_at: datetime.describe(
+    'Date and time at which Seam created the warning.',
+  ),
   message: z
     .string()
     .describe(
@@ -139,10 +138,9 @@ export const user_identity = z.object({
     .describe(
       'Keys that other user identities used to have before they were merged into this user identity. Looking up any of them returns this user identity.',
     ),
-  created_at: z
-    .string()
-    .datetime()
-    .describe('Date and time at which the user identity was created.'),
+  created_at: datetime.describe(
+    'Date and time at which the user identity was created.',
+  ),
   workspace_id: z
     .string()
     .uuid()