From the home screen, swipe down from the Notification bar, and then tap the Settings icon.
Note: The device will automatically attempt to set the date and time from the network. This tutorial demonstrates how to manually set the date and time on your device.
Swipe to the System tab, then tap Date & time.
Tap the Automatic date and time switch to disable.
To change the date, tap Set date.
Swipe to, and then tap the Desired date. Tap OK.
To change the time, tap Set time.
Set the Desired time. Tap OK.