More info on the Indian calendar:
Daksha Praja-pati, the Lord-of-Progeny is, in the Vedas , the source of cosmic movement which is inextricably intertwined with the great seasonal cycles - which lead to his identification with the calendrical year, measured initially as 360 days and later as 365 days. What gives the Hindu calendrical computations great force is the concept of earlier ages measured in millions of years. These ages are called yugas and there are four in all. The first of these is Satya Yuga the color of which is white, followed by Treta Yuga the color of which is red, Dvapara Yuga whose color is yellow, and the last and present age - the Kali Yuga whose color is black. The Kali Yuga is considered to have begun in 3102 bce. During each yuga humanity experiences a corresponding decline in moral and civilized life until the end of the cycle where ignorance, vice, and disease are preponderant and the age comes to an end (Kali destroys Time) and the cycle begins anew. To the right is the Yantra of Kali.