From d63a26fff9d01ae12b47a55bd510cd9c8dc9a815 Mon Sep 17 00:00:00 2001
From: Daniel Schick <schick@textbausteine.net>
Date: Wed, 14 Jan 2026 16:08:26 +0100
Subject: [PATCH] Fix time offset error when saving

---
 src/server/BreCal/schemas/model.py | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/server/BreCal/schemas/model.py b/src/server/BreCal/schemas/model.py
index 7bc6b5e..9bee8e3 100644
--- a/src/server/BreCal/schemas/model.py
+++ b/src/server/BreCal/schemas/model.py
@@ -22,8 +22,8 @@ def _format_datetime(value):
         return None
     if isinstance(value, datetime.datetime):
         if value.tzinfo is None or value.tzinfo.utcoffset(value) is None:
-            return value.isoformat() + "Z"
-        return value.isoformat()
+            return value.isoformat()
+        return value.astimezone().replace(tzinfo=None).isoformat()
     return value
 
 def obj_dict(obj):