Monday. Hopefully my answer helped.
=D,
C&P
It was a Wednesday.
Wednesday
Saturday
May 21, 1949 was a Saturday.
May 21 1927 was a Saturday.
May 21, 1975, was a Wednesday.
May 21 1970 was a Thursday.
May 21 2010 was a Friday.
May 21, 1914 was a Thursday.
May 21 1961 was a Sunday.
May 21, 1946 fell on a Tuesday.
May 21, 1955 fell on a Saturday.