From 8d087644ca800b670df5477158ec656a27bf0cd4 Mon Sep 17 00:00:00 2001
From: walsoup <walidelonk@gmail.com>
Date: Wed, 10 Jun 2026 21:17:10 +0100
Subject: [PATCH 1/2] plistlib: fix TypeError when parsing partial ISO 8601
 dates

---
 Lib/plistlib.py | 14 +++++++++++---
 1 file changed, 11 insertions(+), 3 deletions(-)

diff --git a/Lib/plistlib.py b/Lib/plistlib.py
index 93f3ef5e38af843..c289c6419ad2abd 100644
--- a/Lib/plistlib.py
+++ b/Lib/plistlib.py
@@ -143,9 +143,17 @@ def _date_from_string(s, aware_datetime):
     lst = []
     for key in order:
         val = gd[key]
-        if val is None:
-            break
-        lst.append(int(val))
+        if val is not None:
+            lst.append(int(val))
+        else:
+            # Fill missing components with defaults: month/day -> 1, hour/minute/second -> 0
+            if key in ('month', 'day'):
+                lst.append(1)
+            elif key in ('hour', 'minute', 'second'):
+                lst.append(0)
+            else:
+                # Year should never be missing due to regex
+                raise ValueError("Missing year in date string")
     if aware_datetime:
         return datetime.datetime(*lst, tzinfo=datetime.UTC)
     return datetime.datetime(*lst)

From 9285789d0b23a3325475a9192d95fd0abc3a7e93 Mon Sep 17 00:00:00 2001
From: "blurb-it[bot]" <43283697+blurb-it[bot]@users.noreply.github.com>
Date: Wed, 10 Jun 2026 20:33:35 +0000
Subject: [PATCH 2/2] =?UTF-8?q?=F0=9F=93=9C=F0=9F=A4=96=20Added=20by=20blu?=
 =?UTF-8?q?rb=5Fit.?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 .../next/Library/2026-06-10-20-33-34.gh-issue-151221.gV-PqB.rst  | 1 +
 1 file changed, 1 insertion(+)
 create mode 100644 Misc/NEWS.d/next/Library/2026-06-10-20-33-34.gh-issue-151221.gV-PqB.rst

diff --git a/Misc/NEWS.d/next/Library/2026-06-10-20-33-34.gh-issue-151221.gV-PqB.rst b/Misc/NEWS.d/next/Library/2026-06-10-20-33-34.gh-issue-151221.gV-PqB.rst
new file mode 100644
index 000000000000000..1392e628e5d8c08
--- /dev/null
+++ b/Misc/NEWS.d/next/Library/2026-06-10-20-33-34.gh-issue-151221.gV-PqB.rst
@@ -0,0 +1 @@
+plistlib._date_from_string() was raising a confusing TypeError for partial ISO 8601 dates (e.g., '2024-06Z') because it broke early on missing components. The fix fills missing components with sensible defaults: month/day → 1, hour/minute/second → 0.