• Swipe down from the top of the screen and then tap Settings
• Tap Device Options

• Tap Date & Time

• If Automatic Time Zone is turned On, your device will use a Wi-Fi or Mobile network (if available for the device) to determine the time zone.

• If you want to select your time zone manually, tap Off next to Automatic Time Zone, and then tap Select Time Zone. Select your time zone from the list that appears.

Here you can check your time: https://time.is/