Krita Yuga, a golden age of 4,000 divine years, preceded by a dawn of 400 years and followed by a twilight of equal length; in sum, 4,800 divine years, during the whole of which the Cow of Virtue stands on all four legs, men are perfectly virtuous, and the laws of cast strictly honored.

Treta Yuga, one quarter less virtuous, blissful, and long; in sum, including its dawn and twilight, an age of 3,600 divine years, when the Cow stands on three legs.

Dvapara Yuga, a seond quarter gone, and the Cow is balanced on two legs; a period lasting, with its dawn and twilight, but 2,400 divine years.

Finally Kali Yuga, our own world age; wicked and consequently miserable, with the Cow of Virtue on one leg. And just as in the prophecy of Daniel it is declared that the races of this age "will mix with one another in marriage," so in the sacred texts of India the fourth period is characterized by "the mixture of castes." This lawless terminal age, declining toward catastrophe, is believed to have commenced on February 17, 3102 B.C., and it will endure, including its dawn and twilight, only 1,200 divine years. (432,000 years)

The Mythic Image, p 142.

When Krishna died, the present Kali Age is said to have begun, the last and worst of the four ages of the world.

Mythology, An Illustrated Encyclopedia, p 25.

"The astronomical aspect of the yuga,' states Professor Hermann Jacobi in an article on the Indian system, "is that, in its commencement, sun, moon, and planets stood in conjunction in the initial point of the ecliptic, and returned to the same point at the end of the age. "

The Mythic Image p 149.