Format days header in display timezone

Author: jrauh01

library/Notifications/Widget/TimeGrid/DaysHeader.php

@@ -59,7 +59,8 @@ public function assemble(): void
         $dateFormatter = new IntlDateFormatter(
             Locale::getDefault(),
             IntlDateFormatter::MEDIUM,
-            IntlDateFormatter::NONE
+            IntlDateFormatter::NONE,
+            ScheduleDateTimeFactory::getDisplayTimezone()
         );
 
         for ($i = 0; $i < $this->days; $i++) {