The fastest way to change your MacBook's time

Click the clock in the top-right corner of your screen, then click "Date & Time Preferences" in the menu that appears. A settings window opens. If the lock icon in the bottom-left corner is locked, click it and enter your password. Uncheck "Set date and time automatically" if it is checked. Now you can click the date and time fields and type in the correct values directly.

The whole process takes about 30 seconds if you already know your password. If you do not have administrator access to your MacBook, you will not be able to change the system time — you will see a message saying the setting is locked by your administrator.

Key Takeaways

  • Click the clock in the top-right corner, then select "Date & Time Preferences" to open the settings window.
  • You must unlock the settings panel with your administrator password before you can change the time.
  • Turn off "Set date and time automatically" so your manual changes will stick instead of being overwritten.
  • You can change the date, time, and time zone all in the same window without restarting your MacBook.

Where to find the date and time settings

The clock sits in the menu bar at the very top-right of your screen, next to the battery and Wi-Fi icons. Click it once. A small dropdown menu appears with the current date and time displayed at the top, and a link at the bottom that says "Date & Time Preferences."

Click "Date & Time Preferences" and the System Settings window opens directly to the Date & Time panel. You do not need to hunt through menus — the shortcut takes you straight there.

Unlocking the settings so you can make changes

When the Date & Time panel first opens, most of the fields are grayed out and unclickable. Look at the bottom-left corner of the window. You will see a lock icon. Click it.

Your MacBook will ask you to enter your password. Type the password you use to log in to your account and press Enter. The lock icon changes to an open padlock, and all the grayed-out fields become clickable. If you do not know your password or do not have administrator rights on this MacBook, you will see a message saying the settings cannot be changed.

Turning off automatic time updates

Near the top of the Date & Time panel, you will see a checkbox next to "Set date and time automatically." This option is usually turned on, which means your MacBook syncs with Apple's time servers and ignores any manual changes you make.

If you want to set the time yourself, uncheck this box. Once you do, the date and time fields become fully editable. If you leave this box checked, any time you type in will be overwritten the next time your MacBook connects to the internet.

Entering the correct date and time

After you unlock the settings and turn off automatic updates, click the date field. It shows the current date in the format Month Day, Year — for example, "January 15, 2024." Click in this field and type the correct date, or use the small calendar that appears to select the date with your mouse.

Click the time field next. It shows hours, minutes, and AM or PM. You can click directly in each part and type the numbers, or use the up and down arrows to adjust the time. Make sure you set AM or PM correctly — the difference between 3:00 AM and 3:00 PM matters for scheduling and time stamps.

Changing your time zone

Below the date and time fields, you will see "Time zone." Click the dropdown menu to see a list of time zones organized by region. Scroll to find your location and click it. Your MacBook will update the time automatically based on the zone you select.

If you travel frequently or work across time zones, you can also check the box next to "Set time zone automatically using current location" if your MacBook has location services turned on. This tells your MacBook to update the time zone based on where it thinks you are.

What happens after you change the time

Once you close the Date & Time settings window, your MacBook uses the new time when ready. The clock in the menu bar updates, and any new files you create will have the correct time stamp. However, files you created before the change will keep their original time stamps — changing the system time does not rewrite the past.

If you turned off automatic time updates, your MacBook will keep the time you set until you change it again or turn automatic updates back on. There is no restart required. If you want to go back to letting Apple's servers set the time, straightforward check the "Set date and time automatically" box again.

Frequently Asked Questions

Why is the lock icon still locked even after I enter my password?

Your account may not have administrator rights on this MacBook. Only accounts with admin access can change the system time. If you are not the primary user, ask whoever set up the MacBook to change the time for you, or ask them to give your account admin rights.

Will changing the time affect my calendar or reminders?

Changing the system time can shift when reminders and calendar notifications trigger, especially if you set them for a specific time. If you are changing the time by more than an hour or two, check your calendar and any upcoming reminders after you make the change to make sure they still make sense.

What if I want the time to update automatically again?

Open Date & Time Preferences the same way, unlock the settings, and check the box next to "Set date and time automatically." Your MacBook will sync with Apple's servers and correct the time within a few seconds. You do not need to restart.

Can I change the time format from 12-hour to 24-hour?

Yes. In the Date & Time panel, look for the "Time format" dropdown. You can choose between 12-hour (with AM/PM) and 24-hour format. The change takes effect when ready in the menu bar clock and throughout your system.