Can someone help me with my Net10 Samsung phone?

So i have this net10 samsung phone.. and it is a trac phone, Well i lost it for like o_O like 5 months and it still works! but the time is like O_O REALLY way off.. and the date is set ALL the way back to 2001.. and i dunno how to fix it :S i tried turning it off then back on.. and it did nothinng, anyone have a clue??