diff --git a/packages/lib/CalendarService.ts b/packages/lib/CalendarService.ts
index ff2675ae..295eaa22 100644
--- a/packages/lib/CalendarService.ts
+++ b/packages/lib/CalendarService.ts
@@ -248,10 +248,12 @@ export default abstract class BaseCalendarService implements Calendar {
         const vcalendar = new ICAL.Component(jcalData);
         const vevent = vcalendar.getFirstSubcomponent("vevent");
         const event = new ICAL.Event(vevent);
+        const timezoneComp = vcalendar.getFirstSubcomponent("vtimezone");
+        const tzid: string = timezoneComp?.getFirstPropertyValue("tzid") ?? "UTC";
 
         return {
-          start: event.startDate.toJSDate().toISOString(),
-          end: event.endDate.toJSDate().toISOString(),
+          start: dayjs.tz(event.startDate.toJSDate(), tzid).toISOString(),
+          end: dayjs.tz(event.endDate.toJSDate(), tzid).toISOString(),
         };
       });