That date can be interpreted two ways:
The 3rd of September 1966 was on a Saturday.
March the 9th 1966 was on a Wednesday.
February 9, 1966, was a Wednesday.
Friday
It was a Wednesday.
It was a Wednesday.
Friday
January 9th 1966 was a Sunday.
May 9th, 1966 fell on a Monday.
Monday
That day was a Friday.
September 3 1989 was on a Sunday 9 March 1989 was on a Thursday.
Monday (the day after Mothers' Day)
May 9 was a Saturday