Fix Calendar events showing at the wrong time on your Mac

Why it happens

Every event is stored with a time zone, and Calendar shows it converted to the zone you're viewing in. If your Mac's time zone is wrong, for example after a flight, or an event was saved in another zone, times can look an hour or more off. Time zone support lets you see and set the zone yourself.

How to fix it

1. Open Calendar and choose Calendar, then Settings… from the menu bar. Click Advanced and tick Turn on time zone support.

   Calendar›Settings…›Advanced›Turn on time zone support

2. Close the settings window. A time zone pop-up now appears in the toolbar, next to the search field. Choose the zone you're in.

3. Check your Mac's own time zone. Open System Settings, click General, then Date & Time, and turn on Set time zone automatically using your current location. Make sure the time zone shown there is right.

   General›Date & Time›Set time zone automatically using your current location

4. Look at the event again. It should now show at the right local time.

Still not fixed?

1. If one event is still off, double-click it and look at its time zone. With time zone support on, each event has its own time zone setting, so check it's the one the meeting was really booked in.

2. If an invite from someone abroad looks wrong, ask them which time zone they meant. A time typed into the wrong zone on their side shows wrong on everyone's calendar.

3. Wrong on your iPhone too? Check the time zone there in Settings, under General, then Date & Time, and look for Time Zone Override in the iPhone's Calendar settings.

4. If Calendar still shows old times, choose View, then Refresh Calendars, or quit Calendar with Command-Q and open it again.

   Calendar›View›Refresh Calendars

5. If events keep moving after all of this, or your Mac's clock keeps showing the wrong time, contact Apple Support.