From ba4964f2bd68765fab34be59681d2d04d79819d3 Mon Sep 17 00:00:00 2001
From: Daniel Spitzer <daniel.spitzer@inode.at>
Date: Wed, 22 Oct 2025 09:41:48 +0200
Subject: [PATCH] =?UTF-8?q?Kalender=20Update=20*=20=C3=9Cbergang=20Sommerz?=
 =?UTF-8?q?eit=20Winterzeit=20Bugfix?=
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---
 application/Calendar/CalendarModel.php | 21 +++++++++++++++------
 1 file changed, 15 insertions(+), 6 deletions(-)

diff --git a/application/Calendar/CalendarModel.php b/application/Calendar/CalendarModel.php
index 01e9cd613..d68c9ecbf 100644
--- a/application/Calendar/CalendarModel.php
+++ b/application/Calendar/CalendarModel.php
@@ -92,6 +92,19 @@ class CalendarModel
         $unixtimestamp = $date->getTimestamp() + $cest;
         return date('Y-m-d H:i:s', $unixtimestamp);
     }
+    public static function convertMillisecondsToTimestamp($milliseconds)
+    {
+        $timestamp = $milliseconds / 1000;
+        $date = new DateTime();
+        $date->setTimestamp($timestamp);
+        $date->setTimezone(new DateTimeZone('Europe/Berlin'));
+        if ($date->format('I') == 1) {
+            $offset = 7200;
+        } else {
+            $offset = 3600;
+        }
+        return $timestamp - $offset;
+    }
 
     public static function replace_unicode_sequences($string)
     {
@@ -646,12 +659,8 @@ WHERE `TimerecordingCategory`.`hourday`!='1' AND `TimerecordingCategory`.`hourda
 
     public static function updateCalendarEvent($r, $me)
     {
-        $description = ($r->description);
-        $attachments = ($r->attachments);
-        $location = ($r->location);
-        $title = ($r->title);
-        $start = ((($r->start - 7200000) / 1000));
-        $end = ((($r->end - 7200000) / 1000));
+        $start = CalendarModel::convertMillisecondsToTimestamp($r->start);
+        $end = CalendarModel::convertMillisecondsToTimestamp($r->end);
 
 
         if ($title) {