First,take out the card behind the ds which is black colour.(I guess?)Set the time and
date and open your game.The year have changed!Hope i helped!

Or u can leave the game in and change the date on the ds.

Go to the save screan, save the game, turn power of once done saving, take card out
(unless you are trying to earse data of your game faste, turst me, it happened to me) go
to the settings area after turning it back on, go to date, canged year, press acsept, put
card in got to game. BINGO the year is canged

you can just do it by leaving the game in

You change the year on your nintendo settings.

You change the year in your nintendo settings.