Like the Mayans, the Hindu also have a calendar, and the fourth stage, the Kali Yuga, came to be in 3102 BC, twelve years after the Fifth Great Cycle of the Mayan Long Count calendar began. The Kali Yuga predicts the emergence of a new world on December 21, 2012.
There are four stages of time, and each stage is a further degradation of human morality. We are in the fourth stage of time called the Kali Yuga, which is associated with the demon, Kali. The belief is that rulers will become unreasonable and a danger to the world; there will be open avarice, wrath, and animosity toward one another; lust and eroticism will be socially acceptable, people will prey on others and murder for no reason; there will be no trust of anyone; there will be death and famine; people will become addicted to intoxicants. People will only be aware of the physical body and become preoccupied with it and the material world.
At the end of this stage, Kalki will return on his white horse, and battle Kali and his dark forces. Kalki will end this age of darkness and destruction, the world will suffer a fiery end, and all evil will perish. But then a new age of Satya Yuga, an era of goodness and humanity, will begin again.