Stop Mac Calendar from changing times with time zone changes.

Stop Mac Calendar from changing times with time zone changes.


I have entered flight information with times for departure and arrival in the local times. The Mac version of Calendar changes the displayed arrival time by two hours accounting for the change in time zones.


I want this to stop.


I have Turn On Time Zone Support checked, which instructions say prevents this from happening.



I am now arriving in my destination two hours earlier than I will local time, which messes everything up with reservations, etc.


https://support.apple.com/guide/calendar/use-different-time-zones-icl1035/mac



[Edited by Moderator]

Mac mini (M4 Pro, 2024)

Posted on Mar 5, 2026 7:43 AM

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Question marked as Top-ranking reply

Posted on Mar 9, 2026 11:59 AM

Just turn Timezone support off. That way all the events will stay at whatever time you put in the calendar. But remember, if you are at your destination and you have calendar reminders for things like regular zoom calls which are in your home time then they will alert you at the wrong time.

13 replies

Mar 9, 2026 11:11 AM in response to Zurarczurx

Zurarczurx wrote:

When timezone support is turned on then the time of the event will always be shown at the correct time in your current timezone.

Say I'm in London flying to Paris at 10 am today and flying back from Paris at 4pm Paris time tomorrow. Paris is 1 hour ahead of London, so when it's 4pm in Paris it's 3PM in London.

I put the flights in my calendar. The London flight goes in at 10 am with its timezone set to London and the Paris flight goes in at 4pm with its timezone is set at Paris. As soon as I hit enter the Paris time will switch to 3PM because that's the time that it will be in London time and I'm in London. This might sound stupid for a flight but if it were for, say, a Zoom meeting then you want the meeting time in the calendar and the alerts, etc at the time on your local watch.

When I land in Paris my iPhone and Mac will re-set their times to Paris time, I'll set my watch 1 hour ahead and the Paris flight in the Calendar will re-set to 4pm local time - the actual time of the flight in local time. All the events in my Calendar which are in London time will also move one hour forward. So my weekly zoom call with my mum, which is at 2pm London time, will switch to 3pm in the Calendar because I'm on Paris time. All the calendar alerts for things in UK time will occur at the correct local time as displayed by my watch. I won't miss my zoom call with my mum. If Timezone support were turned off I'd get the Calendar alert at the wrong time.

With Timezone support turned on all your Calendar events, no matter where in the world they are and where in the world you are, are shifted in the calendar to match local time.

You can turn Timezone support off but it means that when you are in a different timezone from where you live you have to work out the real time of all your Calendar events and note that the calendr alerts will go off at the wrong time. In the example above when I'm in Paris I'd have to remember that all my UK calendar events were an hour early.

That's a really good explanation of how it works.

Mar 7, 2026 2:04 AM in response to LexVAPin

When timezone support is turned on then the time of the event will always be shown at the correct time in your current timezone.


Say I'm in London flying to Paris at 10 am today and flying back from Paris at 4pm Paris time tomorrow. Paris is 1 hour ahead of London, so when it's 4pm in Paris it's 3PM in London.


I put the flights in my calendar. The London flight goes in at 10 am with its timezone set to London and the Paris flight goes in at 4pm with its timezone is set at Paris. As soon as I hit enter the Paris time will switch to 3PM because that's the time that it will be in London time and I'm in London. This might sound stupid for a flight but if it were for, say, a Zoom meeting then you want the meeting time in the calendar and the alerts, etc at the time on your local watch.


When I land in Paris my iPhone and Mac will re-set their times to Paris time, I'll set my watch 1 hour ahead and the Paris flight in the Calendar will re-set to 4pm local time - the actual time of the flight in local time. All the events in my Calendar which are in London time will also move one hour forward. So my weekly zoom call with my mum, which is at 2pm London time, will switch to 3pm in the Calendar because I'm on Paris time. All the calendar alerts for things in UK time will occur at the correct local time as displayed by my watch. I won't miss my zoom call with my mum. If Timezone support were turned off I'd get the Calendar alert at the wrong time.


With Timezone support turned on all your Calendar events, no matter where in the world they are and where in the world you are, are shifted in the calendar to match local time.


You can turn Timezone support off but it means that when you are in a different timezone from where you live you have to work out the real time of all your Calendar events and note that the calendr alerts will go off at the wrong time. In the example above when I'm in Paris I'd have to remember that all my UK calendar events were an hour early.





Mar 9, 2026 3:32 PM in response to LexVAPin

"That's a really good explanation of how it works. "

And exactly what I want to stop.

Then, for the third time, turn off time zone support - untick the box on the your Mac and turn on Time Zone Override. Personally I think it will cause you more problems.


As for your example


"That does not apply to what I am looking for. I fly from EDT to Germany, and the airline lists arrival 6 AM and my connection leaves at 9 AM, that is what I enter into my calendar. The calendar changes those times by 6 hours. Now my alerts go off "at the wrong time" for me. That is what I want it to stop. "


If you have Timezone turned on then, as explained, when you land in Germany your iPhone will re-set its time by 6 hours to Central European Time because it knows you're in Germany. The calendar entries will move by 6 hours to their correct local time and the alerts will go off at the right time. if you don't want it to do that for you then, as described above, just turn off timezone support on your devices.



Mar 6, 2026 9:17 AM in response to Zurarczurx

BTW, I went into the event. There is no selection for time zone. I select arrival for 12:00 and it changes it to 11AM. I am leaving EDT and arriving at CDT. I am not even sure how the Calendar knows where the flight is going to, other than it includes the flight number.




And the same event was imported from Google Calendar and somewhere the times were changed to 5PM to 6:53PM with displayed times of GMT+2. How the heck did anything like that occur?


I want Calendar to completely ignore the time zone.

Mar 7, 2026 7:14 AM in response to Zurarczurx

I have turned on Zone Support. That is what I thought the Apple instructions tell me to do.


When I look at my calendar, it says that my flight will land in a Mountain Time Zone city two hours earlier than it will if I enter it while I am on the east coast.


"are shifted in the calendar to match local time."

" This might sound stupid for a flight". It is horrendous when scheduling travel and trip times and knowing when I have to be at the airport or train station.


Ex: Flight leaves Central time city at 12:45 PM and lands Mountain time city at 3:15 PM. How do I set this up so I can enter the times and it will show up at the correct local time? Right now it tells me that the flight is going to land at 2:15, which is not correct.


Even worse, it changes my return time so that it is now an hour (or two if starting east coast) early.


I then have a flight from Mountain time to the west coast. None of those times in my calendar are anywhere close to correct now.


How do I get Calendar to just leave the times I input alone and not change them?


I had a similar issue when I set up all of my travel times on a trip to Europe. All of the plane and train times were wrong.


"You can turn Timezone support off but it means that when you are in a different timezone from where you live you have to work out the real time of all your Calendar events and note that the calendr alerts will go off at the wrong time."


I am not sure what you mean there. Example: I booked while I am on the east coast, a flight from Mountain to West.

The local times are 10:45AM and arrive 11:05AM. As with all flights, they are the local time.


I accepted an event from the airline for those times. The times that are in my calendar are 5:45PM for departure which isn't even close.


Mar 9, 2026 2:58 PM in response to Zurarczurx

Thanks for that detailed explanation. And what you are describing something that I have no use for and exactly what I want to avoid - I do not want the times changed.


From my original post: "I have entered flight information with times for departure and arrival in the local times. The Mac version of Calendar changes the displayed arrival time by two hours accounting for the change in time zones. I want this to stop."


Your comment: "You can turn Timezone support off but it means that when you are in a different timezone from where you live you have to work out the real time of all your Calendar events and note that the calendr alerts will go off at the wrong time."


That does not apply to what I am looking for. I fly from EDT to Germany, and the airline lists arrival 6 AM and my connection leaves at 9 AM, that is what I enter into my calendar. The calendar changes those times by 6 hours. Now my alerts go off "at the wrong time" for me. That is what I want it to stop.





Mar 9, 2026 3:13 PM in response to IdrisSeabright

"That's a really good explanation of how it works. "


And exactly what I want to stop.


From my original post: "I have entered flight information with times for departure and arrival in the local times. The Mac version of Calendar changes the displayed arrival time by two hours accounting for the change in time zones. I want this to stop."


Here is an example: Flight departs from Mountain Time at 12:42 PM. That is what I enter. The Calendar changes the flight time to 1:42 PM. Now I will be an hour late for my flight.

There has to be a simple way to stop this.

My iPhone Calendar is set this way:

My Mac was set this way:





Mar 9, 2026 4:49 PM in response to Zurarczurx

"Then, for the third time, turn off time zone support - untick the box on the your Mac and turn on Time Zone Override. Personally I think it will cause you more problems. "

But what you said was, ""When timezone support is turned on then the time of the event will always be shown at the correct time in your current timezone." I am finding that is not true.


I just got off from texting Apple Support. They also told me to turn on time zone support. When I walked through the steps I did, they did not understand why it did not work. They said that they are investigating.


" Personally I think it will cause you more problems. if you are at your destination and you have calendar reminders for things like regular zoom calls which are in your home time then they will alert you at the wrong time."


I have never mentioned Zoom calls nor meetings as an issue for me. I do not have those to worry about. All I have to worry about is making my connections whether air or train. Having the hotel reservations display on the correct date and not be moved due to time zone issues. That has been my question from the beginning. Telling me my train leaves at the wrong time is the issue as I will miss my train.


A number of people have tried to convince me what to do based on meetings that I might have. Or zoom calls. Nope. My question from the beginning has been flight times, arrival and departure of connections, plus when my train in another country is booked for.

Stop Mac Calendar from changing times with time zone changes.

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