Why the Mayan Calender Ended in 2012

Steve: Hey, Bob, I'm at December 12, 2012 of the Calender! :D

Bob: Dude, when I said make a calender for everyday, I meant in a YEAR! NOT EVERY YEAR THAT WILL EVER HAPPEN! YOU IDIOT!

Steve: oh.

Bob: FIND SOMETHING GOOD TO DO WITH YOUR LIFE!