15 December 1997 was a Monday.
Monday
September 15 1997 was on a Monday.
April 15 1997 was a Tuesday.
March 15 1997 was a Saturday.
October 15, 1997 was on a Wednesday.
December 15, 1977 was a Thursday.
15 December 1958 was a Monday.
15 December 1935 was on a Sunday.
December 15 2010 was a Wednesday.
December 15, 1936 was a Tuesday.
15 December 1980 was a Monday.
December 15 1993 was on a Wednesday.