It was a Monday.
Days from 29th June 1961 until 13th February 1987 are 9360.
In 2012 the 13th of July was a Friday
That was on a Saturday.
It was a Friday.
September 13th 1961 was a Wednesday.
It was a Tuesday.
February 13th, 1965 was a Saturday.
13th february 1972 was a Sunday.
13th February 1988 13th February 1988 13th Febuary 1988
February 13th, 1900 was a Tuesday.
February 13th, 1947 fell on a Thursday.
February 13th, 1968 fell on a Tuesday.