The given date was a Saturday.
5.1.65 means May 1 1965, a Saturday, in the US, or 5 January 1965, a Tuesday, in most other countries.
Dec 1st 1965 was a Wednesday.
September 1st, 1965 was on a Wednesday.
Friday
That was on a Monday.
May 6th 1965 was a Thursday.
May 4 1965 was on a Tuesday.
May 20 1965 was on a Thursday.
May 31, 1965, was a Monday.
May 12, 1965, was a Wednesday.
May 6 1965 was on a Thursday.
May 24, 1965 was a Monday.