It was a Monday.
Tuesday
October 31, 1962 was a Wednesday.
October 31, 2011, will be a Monday.
May 31, 1983 was a Tuesday.
August 31, 1983 fell on a Wednesday.
March 31, 1983 fell on a Thursday.
A Sunday
January 31(Friday),October 1(Wednesday)
January 31st, 1983 fell on a Monday.
October 31st, 1986 fell on a Friday. The following year, it fell on a Saturday.
Oct 31, 2010 will be a Sunday.
Week 45 of 2010 starts Oct 31 - Nov 6.