diff --git a/.patches/sabre-vobject-rdate.patch b/.patches/sabre-vobject-rdate.patch
new file mode 100644
index 000000000..226a5e6c9
--- /dev/null
+++ b/.patches/sabre-vobject-rdate.patch
@@ -0,0 +1,89 @@
+From 099a37744a3aaf368bdd339f9c01e34553e8828e Mon Sep 17 00:00:00 2001
+From: SebastianKrupinski <krupinskis05@gmail.com>
+Date: Wed, 19 Nov 2025 19:19:32 -0500
+Subject: [PATCH] fix: use RDATE in time range check and use all instances
+
+Signed-off-by: SebastianKrupinski <krupinskis05@gmail.com>
+---
+ lib/Component/VEvent.php               |  2 +-
+ lib/Recur/EventIterator.php            |  6 ++++-
+ tests/VObject/Component/VEventTest.php | 35 ++++++++++++++++++++++++++
+ 3 files changed, 41 insertions(+), 2 deletions(-)
+
+diff --git a/lib/Component/VEvent.php b/lib/Component/VEvent.php
+index e29e56322..6ca196d66 100644
+--- a/lib/Component/VEvent.php
++++ b/lib/Component/VEvent.php
+@@ -41,7 +41,7 @@ class VEvent extends VObject\Component
+      */
+     public function isInTimeRange(\DateTimeInterface $start, \DateTimeInterface $end): bool
+     {
+-        if ($this->RRULE) {
++        if ($this->RRULE || $this->RDATE) {
+             try {
+                 $it = new EventIterator($this, null, $start->getTimezone());
+             } catch (NoInstancesException $e) {
+diff --git a/lib/Recur/EventIterator.php b/lib/Recur/EventIterator.php
+index 2c93bcf4e..79a070ee4 100644
+--- a/lib/Recur/EventIterator.php
++++ b/lib/Recur/EventIterator.php
+@@ -164,8 +164,12 @@ public function __construct($input, ?string $uid = null, ?\DateTimeZone $timeZon
+         }
+ 
+         if (isset($this->masterEvent->RDATE)) {
++            $rdateValues = [];
++            foreach ($this->masterEvent->RDATE as $rdate) {
++                $rdateValues = array_merge($rdateValues, $rdate->getParts());
++            }
+             $this->recurIterator = new RDateIterator(
+-                $this->masterEvent->RDATE->getParts(),
++                $rdateValues,
+                 $this->startDate
+             );
+         } elseif (isset($this->masterEvent->RRULE)) {
+diff --git a/tests/VObject/Component/VEventTest.php b/tests/VObject/Component/VEventTest.php
+index 50fa626cc..5944ea574 100644
+--- a/tests/VObject/Component/VEventTest.php
++++ b/tests/VObject/Component/VEventTest.php
+@@ -89,6 +89,41 @@ public function timeRangeTestData(): array
+         $vevent9->RRULE = 'FREQ=DAILY';
+         $tests[] = [$vevent9, new \DateTime('2016-10-31'), new \DateTime('2016-12-12'), true];
+ 
++        // Added this test to check events with RDATE property with multiple dates
++        $vevent10 = clone $vevent;
++        $vevent10->DTSTART = '20140901T000000Z';
++        $vevent10->DTEND = '20140901T010000Z';
++        $vevent10->add('RDATE', ['20141001T000000Z', '20141101T000000Z']);
++        // DTSTART is the first occurrence
++        $tests[] = [$vevent10, new \DateTime('2014-09-01'), new \DateTime('2014-09-02'), true];
++        // RDATE adds additional occurrences on Oct 1 and Nov 1
++        $tests[] = [$vevent10, new \DateTime('2014-10-01'), new \DateTime('2014-10-02'), true];
++        $tests[] = [$vevent10, new \DateTime('2014-11-01'), new \DateTime('2014-11-02'), true];
++        // No occurrence in December
++        $tests[] = [$vevent10, new \DateTime('2014-12-01'), new \DateTime('2014-12-31'), false];
++        // Range that includes first occurrence
++        $tests[] = [$vevent10, new \DateTime('2014-08-01'), new \DateTime('2014-09-30'), true];
++        // Range that spans all occurrences
++        $tests[] = [$vevent10, new \DateTime('2014-08-01'), new \DateTime('2014-12-31'), true];
++
++        // Added this test to check events with RDATE property with multiple instances
++        $vevent11 = clone $vevent;
++        $vevent11->DTSTART = '20140901T000000Z';
++        $vevent11->DTEND = '20140901T010000Z';
++        $vevent11->add('RDATE', '20141001T000000Z');
++        $vevent11->add('RDATE', '20141101T000000Z');
++        // DTSTART is the first occurrence
++        $tests[] = [$vevent11, new \DateTime('2014-09-01'), new \DateTime('2014-09-02'), true];
++        // RDATE adds additional occurrences on Oct 1 and Nov 1
++        $tests[] = [$vevent11, new \DateTime('2014-10-01'), new \DateTime('2014-10-02'), true];
++        $tests[] = [$vevent11, new \DateTime('2014-11-01'), new \DateTime('2014-11-02'), true];
++        // No occurrence in December
++        $tests[] = [$vevent11, new \DateTime('2014-12-01'), new \DateTime('2014-12-31'), false];
++        // Range that includes first occurrence
++        $tests[] = [$vevent11, new \DateTime('2014-08-01'), new \DateTime('2014-09-30'), true];
++        // Range that spans all occurrences
++        $tests[] = [$vevent11, new \DateTime('2014-08-01'), new \DateTime('2014-12-31'), true];
++
+         return $tests;
+     }
+ }
diff --git a/composer.patches.json b/composer.patches.json
index ae985da3f..73fb07c30 100644
--- a/composer.patches.json
+++ b/composer.patches.json
@@ -6,6 +6,9 @@
 		},
 		"sabre/dav": {
 			"Check for instanceof INode instead of Node": ".patches/check-for-instanceof-INode-instead-of-Node-1595.patch"
+		},
+		"sabre/vobject": {
+			"fix use RDATE in time range check and use all instances": ".patches/sabre-vobject-rdate.patch"
 		}
 	}
 }