The Mayan calendar is set to end on Dec 21, 2012. There are many theories why this date ends the Mayan Calendar. Many feel that this date is the day of end times and the world will be destroyed. Others feel this will be a time of major earth disasters, space changes, and mythical planets invading our galaxy along with strange Milky Way alignments. There is talk of a pole flip causing problems all over the earth or this being when we have a second coming of Christ.