From 8343e612920f5c83eab8bc44b43caae744c870bf Mon Sep 17 00:00:00 2001
From: KyleKatarn <kylekatarnls@gmail.com>
Date: Sat, 23 Jul 2022 17:56:55 +0200
Subject: [PATCH] Copy non immutable dates to apply timezone

Fix #194
---
 src/OpeningHours.php | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/OpeningHours.php b/src/OpeningHours.php
index 39cf104..f929a8c 100644
--- a/src/OpeningHours.php
+++ b/src/OpeningHours.php
@@ -694,6 +694,10 @@ protected function normalizeDayName(string $day)
     protected function applyTimezone(DateTimeInterface $date)
     {
         if ($this->timezone) {
+            if ($date instanceof DateTime) {
+                $date = clone $date;
+            }
+
             $date = $date->setTimezone($this->timezone);
         }