To determine the day of the week for October 13, 1977, we can use Zeller's Congruence formula. By applying the formula, we find that October 13, 1977, was a Thursday. Zeller's Congruence formula is a mathematical algorithm to calculate the day of the week for any given date in history.
August 13 1977 was a Saturday.
November 13 1977 was a Sunday.
February 13 1977 was a Sunday.
November 13, 1977 was a Sunday.
September 13, 1977 fell on a Tuesday.
Wednesday
13 October 1932 was a Thursday.
13 October 1958 was a Monday.
13 October 1970 was a Tuesday.
13 October 1978 was a Friday.
13 October 1964 was a Tuesday.
13 October 1965 was a Wednesday.