The 2012 phenomenon comprises a range of eschatological beliefs that cataclysmic or transformative events would had to occur on December 21, 2012. This date is regarded as the end-date of a 5,125-year-long cycle in the Mesoamerican Long Count calendar. Various astronomical alignments and numerological formulae related to this date have been proposed.
A New Age interpretation of this transition postulates that this date marks the start of time in which Earth and its inhabitants may undergo a positive physical or spiritual transformation, and that 2012 may mark the beginning of a new era. Others suggest that the 2012 date marks the end of the world or a similar catastrophe. Scenarios suggested for the end of the world include the arrival of the next solar maximum, or Earth’s collision with a black hole or a passing asteroid or planet called “Nibiru”.