In the early morning hours of 18 February 3102 BC, Lord Krishna dropped his physical body in a forest near Dwaraka at the west coast of India. His departure happened after a bloody massacre where all men of the Yadu clan had killed each other. It was the end of an incredible incarnation and a turning point of human history. This moment is seen as the beginning of the present dark age, of Kali Yuga.
The date is given in the prefaces of the books “Music of the Soul” and “Man Sacrifice” of Dr. Ekkirala Krishnamacharya (Master EK) and, with some more details, in the biography of Sripada Srivallabha. There it says:
“The demise of Sri Krishna took place during 3102 B.C., 18th day of February, during the night at 02 hours 27 minutes and 30 seconds. It happened in the year named Pramadi, in the month of Chaitra, Padyami of the first fortnight of the lunar month, Friday, and Ashwini star; Kali entered after the niryana of Sri Krishna.”
Sri Kumar (Master KPK) explained in 2014:
“The Kali Yuga is said to have begun in 3102 BC and most of you know the period of this Yuga as 432000 years. We have Dwapara, Treta and Kruta yugas as twice, thrice and 4 times the period of Kali Yuga. All the 4 Yugas added together is called Maha Yuga and 1000 such Maha yugas form 1 manvantara and 14 such manvantaras form one day of Brahma, 360 such days of Brahma form 1 year and 100 such years is the life time of Brahma.”
If you are interested in more details, please read the related chapter in “Man Sacrifice” – how Krishna instructed Lord Maitreya before his departure and what happened afterwards.
