""I've had two teenagers who were considering killing themselves, because they didn't want to be around when the world ends, (...) Two women in the last two weeks said they were contemplating killing their children and themselves so they wouldn't have to suffer through the end of the world." "- 
The Mayan calendar was the first calendar used in the Americas. The completion of the thirteenth B'ak'tun cycle happened in late 2012, and the calender itself will end in the 48th century. See Ancient Mayans.
Some silly people, with seemingly no evidence whatsoever, believe that the world will end when the Mayan calendar ends, just like how the world was supposed to end those numerous other times, like with Harold Camping. Very many ruthless businesses made money frightening people and selling "End of the World" related material. Later when the world doesn't end these greedy, selfish people will enjoy spending the cash they cheated gullible people into giving them.