Wrong calculation of Kali Yuga

For example, October 1, 1965, corresponds to day 1,850,569 in Kali-yuga. On
the basis of this information one can calculate that the Kali-yuga began on
February 18, 3102 B.C., according to the Gregorian calendar. It is for this
reason that Vaisnavas maintain that the pastimes of Krsna with the Pandavas
in the battle of Kuruksetra took place about 5,000 years ago.

Vedic Cosmography and Astronomy by Richard L. Thompson (Sadaputa Dasa)
Chapter 1. The Astronomical Siddhantas: The Starting Date of Kali-yuga