Open System Settings and find the Date & Time panel

The fastest way to change your Mac's timezone is through System Settings. Click the Apple menu in the top-left corner of your screen, then select System Settings from the dropdown. On older Macs running macOS Monterey or earlier, this is called System Preferences instead.

Once System Settings opens, look for General in the sidebar on the left. Click it, then select Date & Time from the options that appear. You will see your current timezone listed on the right side of the window.

Key Takeaways

  • Your Mac's timezone lives in System Settings under General > Date & Time, and you can change it in under a minute.
  • Click the timezone field and search by city name — typing "Denver" or "London" is faster than scrolling through a list.
  • Your Mac will automatically adjust for daylight saving time once you set the correct timezone.
  • Changing your timezone does not affect the actual time on your computer if you have "Set time automatically" turned on.
  • If your timezone does not update after you change it, restart your Mac to force the system to recognize the change.

Click the timezone field and type your city name

The timezone field shows your current location — something like "America/Los_Angeles" or "Europe/London". Click directly on this field to open a search box. You do not need to know the exact timezone name. straightforward type the name of a major city in your timezone: "New York", "Tokyo", "Sydney", or "Mexico City" all work.

As you type, macOS filters the list to show matching cities. Select the one you want from the dropdown. If you are unsure which city represents your timezone, pick any city in that zone — the timezone offset is what matters, not the specific city name.

Make sure "Set time automatically" is enabled

Below the timezone field, you will see a checkbox labeled Set time automatically. This should be turned on (checked) in almost all cases. When this is enabled, your Mac fetches the correct time from Apple's servers and automatically adjusts for daylight saving time in your region.

If you turn this off, you will need to manually set both the date and time whenever they change — including twice a year for daylight saving. Leave it on unless you have a specific reason to manage the time yourself.

Verify the change took effect

After you select a new timezone, close the System Settings window. Look at the clock in the top-right corner of your menu bar — it should now show the time in your new timezone. If the time does not change when ready, your Mac may need a few seconds to update.

Check the time against a reliable source like your phone or a website. If the displayed time is still wrong after waiting 30 seconds, restart your Mac by clicking the Apple menu, selecting Restart, and waiting for it to boot back up. This forces the system to reload timezone data from your settings.

Changing timezone for a specific app or meeting

Some apps like Calendar and Mail show times in your system timezone automatically. If you need to see what time a meeting is in a different timezone without changing your Mac's settings, open Calendar and look for timezone options in the event details. Many calendar apps let you display multiple timezones at once.

For quick timezone conversions, use the Clock app that comes with macOS. Open Launchpad, search for "Clock", and click the World Clock tab. You can add multiple cities and see their times side by side without changing your system timezone.

What happens to your files and timestamps

Changing your timezone does not rename, move, or alter any of your files. File timestamps in Finder will display in your new timezone, but the actual files are unchanged. If you have backups made before the timezone change, they will still work normally.

Applications that depend on timezone data — like scheduling software, email clients, or time-tracking tools — will begin using your new timezone when ready. If you work across multiple timezones regularly, consider keeping your Mac set to UTC (Coordinated Universal Time) and using individual apps' timezone settings instead.

Frequently Asked Questions

Will changing my timezone affect my scheduled backups or Time Machine?

No. Time Machine backups continue on their normal schedule regardless of timezone changes. The backup times may display differently in the Time Machine interface, but the backups themselves are not affected. Your Mac will still back up at the same intervals it did before.

Why does my timezone keep changing back to the wrong one?

If "Set time automatically" is on, your Mac may be detecting your location and resetting the timezone. Turn off location services for System Settings, or disable "Set time automatically" and manually set your timezone. Some VPNs can also trigger automatic timezone changes — check your VPN settings.

Can I set different timezones for different user accounts on the same Mac?

No. Timezone is a system-wide setting that applies to all user accounts on your Mac. Each account sees the same clock and timezone. If multiple people use the same Mac and need different timezones, they will need to change the system setting when they switch accounts.

What if my city is not in the timezone list?

Type a larger city in your timezone instead. If you live in a small town, search for the nearest major city in the same timezone. For example, if your town is not listed but you are in the Mountain timezone, type "Denver" or "Phoenix". The timezone offset is what matters.

Does changing timezone affect the time shown in emails or documents I created?

Emails and documents created before the timezone change will still show their original timestamps. New emails and documents will use your new timezone. If you need to preserve the original timezone information, check your email client's settings — some let you display times in multiple zones.