Tuesday.
You can find a day of week calculator at this site. Just enter in the date and it will calculate it for you:
http://www.searchforancestors.com/utility/dayofweek.html
It was a Tuesday.
It was a Thursday.
February 1, 1977 was a Tuesday.
February 1 1988 was a Monday.
1 February 1985 was a Friday.
February 1 2000 was a Tuesday.
1 February 1995 was a Wednesday.
1 February 1957 was on a Friday.
Thursday, February 1, 2001
February 1 1921 was a Tuesday.
February 1 2010 was a Monday.
February 1, 2011 was a Tuesday.