How often does May 7 fall on a Friday. I'm trying to date something Friday May 7th no year but think mid to late 60s early 70s?

May 7 falls on a Friday in the years 1965, 1971, and 1976 during the mid to late 60s and early 70s. If you are looking for a Friday in that time frame, either 1965 or 1971 could be a good fit.