Taking from the start of the 20th century, the 20th of July was on a Tuesday in 1909, 1915, 1920, 1926, 1937, 1943, 1948, 1954, 1965, 1971, 1976, 1982, 1993, 1999, 2004 and 2010. It will next be on a Tuesday in 2021.
Tuesday.
2004 & 2010
July 20 2010 was a Tuesday.
Tuesday
Tuesday
Tuesday.
Tuesday
July 20, 1989 was a Thursday.
Tuesday
It was a Tuesday.
January 20 2004 was a Tuesday.
June 20, 1978, was a Tuesday.