From the home screen, swipe down from the Notification bar. 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.
Under the General tab, scroll to, then tap Date & time.
If turned on, tap Automatic date & time to turn off.
Tap Set date.
Scroll to the desired date.
Tap Set time.
Scroll to the desired time.
Tap Use 24-hour format to switch between 12-hour and 24-hour formats.