From the home screen, drag down from the top of the screen with two fingers to reveal the quick settings menu. 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.
Tap the Settings icon.
Scroll to 'PHONE', then tap Date & time.
Tap the Automatic date & time checkbox to toggle on/off.
Tap Set date.
Touch and drag the Date rollers to set the desired date.
Tap Set time.
Touch and drag the Time rollers to set the desired time.