You can set the system date and time from this screen. The top line of the screen is used to set the date, and the bottom line is used to set the time. The time is in 12-hour time, with AM and PM.

When you have set the date and time to your satisfaction, press the [OK] button and a dialog will pop up to ask you to confirm the new date and time. If you don't wish to set this time, pressing the [NO] button returns you to the date and time screen, while [YES] actually sets the date and time.