Kali Yuga

Etymology
, from

Proper noun

 * 1) In Hinduism, the fourth and most evil of four stages of development that the world goes through as part of the cycle of yugas, traditionally thought to have begun at midnight (00:00) on 18 February, 3102  under the Julian calendar (23 January under the Gregorian calendar), and lasts for 432,000 years.

Usage notes
The "Kali" in "Kali Yuga" refers to a demon, not the goddess Kāli.