Thursday.
21st January 2004 fall on a Wednesday.
January 1, 1988 fell on a Friday.
January 21st, 2020 will fall on a Tuesday.
Saturday
Thursday.
January 21, 1987 fell on a Wednesday.
January 21st 2010 is a Thursday.
January 21st, 1900 was a Sunday.
January 21st, 1963 fell on a Monday.
January 21st, 1975 fell on a Tuesday.
21st Sept 1990 was a Friday.
21st of November 1968 was a Thursday.