"In my view, the references connected with the fourth millennium B.C.E. date, although intriguing, are too speculative to be used as substantial evidence. In the post- 2500 B.C.E. period, however, the quality and quantity of references supporting the position of the sun in Krttika at the vernal equinox are more substantive. They should be given due consideration as a serious possibility. They are as valid a chronological indicator as anything else that has been brought forward to date the Vedic texts. But they cannot win the day in and of themselves without additional, outside support."
January 1, 1970
https://en.wikiquote.org/wiki/Edwin_Bryant