12/21/2012 Survivor Shirts make Great Christmas Gifts - - The 2012 phenomenon comprises of beliefs in which cataclysmic or transformative events will occur on 21 December 2012. This date is regarded as the end-date of a 5,125-year-long cycle in the Mesoamerican Long Count calendar. A New Age interpretation of this transition is that this date marks the start of time in which Earth and its inhabitants may undergo a positive physical or spiritual transformation, and mark the beginning of a new era. Others suggest it marks the end of the world. Scenarios suggested include the arrival of the next solar maximum, an interaction between Earth and the black hole, or Earth's collision with a planet called "Nibiru".