By default, ChromeOS uses your IP address to determine your time zone. If your Chromebook cannot be connected to the internet to update your time zone, or you want the clock to display a different time zone than the one you are in, you can change the time zone in the Settings application.
How to change the time zone
- Select the Clock in the lower right corner of the screen.
- Select the gear icon to open the Settings⚙️ application.
- On the left side of the Settings window, select System Preferences.
- On the right side, select Time Zone.
- Select Choose from list.
- In the dropdown select your desired time zone.