diff --git a/packages/lib/CalendarService.ts b/packages/lib/CalendarService.ts
index 5212d1b18e..25b16f37b7 100644
--- a/packages/lib/CalendarService.ts
+++ b/packages/lib/CalendarService.ts
@@ -47,6 +47,17 @@ const getDuration = (start: string, end: string): DurationObject => ({
   minutes: dayjs(end).diff(dayjs(start), "minute"),
 });
 
+const buildUtcOffset = (minutes: number): string => {
+  const h =
+    minutes > 0
+      ? "+" + (Math.floor(minutes / 60) < 10 ? "0" + Math.floor(minutes / 60) : Math.floor(minutes / 60))
+      : "-" +
+        (Math.ceil(minutes / 60) > -10 ? "0" + Math.ceil(minutes / 60) * -1 : Math.ceil(minutes / 60) * -1);
+  const m = Math.abs(minutes % 60);
+  const offset = `${h}:${m}`;
+  return offset;
+};
+
 const getAttendees = (attendees: Person[]): Attendee[] =>
   attendees.map(({ email, name }) => ({ name, email, partstat: "NEEDS-ACTION" }));
 
@@ -274,6 +285,24 @@ export default abstract class BaseCalendarService implements Calendar {
       if (vevent?.getFirstPropertyValue("transp") === "TRANSPARENT") return;
 
       const event = new ICAL.Event(vevent);
+
+      const tzid: string | undefined = vevent?.getFirstPropertyValue("tzid");
+      // In case of icalendar, when only tzid is available without vtimezone, we need to add vtimezone explicitly to take care of timezone diff
+      if (!vcalendar.getFirstSubcomponent("vtimezone") && tzid) {
+        const timezoneComp = new ICAL.Component("vtimezone");
+        timezoneComp.addPropertyWithValue("tzid", tzid);
+        const standard = new ICAL.Component("standard");
+        // get timezone offset
+        const tzoffsetfrom = buildUtcOffset(dayjs(event.startDate.toJSDate()).tz(tzid, true).utcOffset());
+        const tzoffsetto = buildUtcOffset(dayjs(event.endDate.toJSDate()).tz(tzid, true).utcOffset());
+        // set timezone offset
+        standard.addPropertyWithValue("tzoffsetfrom", tzoffsetfrom);
+        standard.addPropertyWithValue("tzoffsetto", tzoffsetto);
+        // provide a standard dtstart
+        standard.addPropertyWithValue("dtstart", "1601-01-01T00:00:00");
+        timezoneComp.addSubcomponent(standard);
+        vcalendar.addSubcomponent(timezoneComp);
+      }
       const vtimezone = vcalendar.getFirstSubcomponent("vtimezone");
 
       if (event.isRecurring()) {