May 31st, 1957 fell on a Friday. The following year, May 31st fell on a Saturday.
May 31 falls on a Saturday in exactly 14.25% of all years, including, most recently, 2003.
May 31st, 1941 fell on a Saturday.
May 31st, 1986 fell on a Saturday.
2008
It falls on 2021.
31st May 1975 was a Saturday.
Saturday
In a 28-year cycle, which, for the sake of convenience, lasts from 2011 to 2038, May 16 will fall on a Saturday in the years: 2015, 2020, 2026, and 2037.
The next two occurrences will be in 2014 and in 2025.
In any 28-year cycle, beginning, for the sake of convenience, in 2011, and ending in 2038, May 9 will fall on a Saturday in 2015, 2021, 2026, and 2037. For any further years to fit this criterion, add 28 further years to these.
May 31st or May 30th in a leap year.