It was a Monday.
February 20 1984 was a Monday.
The 20th of February 2022 fell on a Sunday.
Wednesday
The given date was a Wednesday.
20th of February 1974 was a Wednesday.
February 20th, 1993 fell on a Saturday.
February 20th, 1944 fell on a Sunday.
February 13th - 20th, 2009
Every day of the week has fallen on February 20th. This depends on what year you are referring to.
monday
February 10th 1984 was a Friday.
February 3, 1984 was on a Friday.