The date and time are usually set for you based on your location—take a look at the Lock screen to see if they’re correct.
Set whether iPod touch updates the date and time automatically. Go to Settings > General > Date & Time, then turn Set Automatically on or off. If you set iPod touch to update the time automatically, it gets the correct time based on your Wi-Fi connection. In some cases, iPod touch may not be able to automatically determine the local time.
Set the date and time manually. Go to Settings > General > Date & Time, then turn off Set Automatically. Tap Time Zone to set your time zone. Tap the Date & Time button, then tap Set Date & Time.
Set whether iPod touch shows 24-hour time or 12-hour time. Go to Settings > General > Date & Time, then turn 24-Hour Time on or off. (24-Hour Time may not be available in all areas.)