That was a Wednesday according to this site. http://www.johngaughan.net/toys/day.php?day=12&month=8&year=1959
June 12th, 1959 was a Friday.
August 12th, 1959
The 12th August 1964 was a Wednesday.
12th August 1994 was a Friday.
August 12th 2000 was a Saturday.
August 12th, 1973 fell on a Sunday.
August 12th, 1990 fell on a Sunday.
It was a Thursday.
Sunday
August 12th.
August 24, 1959, was a Monday.
Sunday