Instructions
Remove any game cartridges from your Nintendo DS.
Turn on the Nintendo DS and tap the screen, or press "A" to bypass the warning screen.
Select the DS icon at the bottom of the screen and select the calendar/time icon.
Select the clock icon to change the time or the calendar icon to change the date.
Use the arrows to change the time or date and tap "Confirm." Select "Go Back," then "Quit" and "Yes." Restart the system and start the game normally.