Srimad Bhagavatam 12 02 The Symptoms of Kali yuga

Kali yuga "Yuga" is an age or cycles. According to the Indian philosophy our evolution is divided into the four yugas or cycles. The Kali-yuga is the present age. It means the "Black Age," a period of 432,000 years. (Source : Alice Ann Bailey, Initiation, Human and Solar).