diff --git a/openapi/components/schemas/RevenueStatistics.yaml b/openapi/components/schemas/RevenueStatistics.yaml
index 065f784..4dd4792 100644
--- a/openapi/components/schemas/RevenueStatistics.yaml
+++ b/openapi/components/schemas/RevenueStatistics.yaml
@@ -33,11 +33,11 @@ properties:
     minimum: 0
   startDate:
     type: string
-    format: date
+    format: date-time
     description: Start date of the revenue calculation period.
   endDate:
     type: string
-    format: date
+    format: date-time
     description: End date of the revenue calculation period.
 required:
   - revenue
diff --git a/openapi/paths/revenue.yaml b/openapi/paths/revenue.yaml
index 783f957..f90e261 100644
--- a/openapi/paths/revenue.yaml
+++ b/openapi/paths/revenue.yaml
@@ -19,8 +19,8 @@ get:
         Defaults to 30 days ago if not provided.
       schema:
         type: string
-        format: date
-      example: '2026-01-01'
+        format: date-time
+      example: '2026-01-01T00:00:00Z'
     - name: endDate
       in: query
       required: false
@@ -29,8 +29,8 @@ get:
         Defaults to current time if not provided.
       schema:
         type: string
-        format: date
-      example: '2026-01-31'
+        format: date-time
+      example: '2026-01-31T23:59:59Z'
   responses:
     '200':
       description: Revenue statistics retrieved successfully.