It was a Saturday.
17th September 1997 was a Wednesday.
September 17th, 1967 fell on a Sunday.
May 17th, 2011 fell on a Tuesday.
December 17th, 2011 fell on a Saturday.
Thursday
September 17th, 1999 was a Friday.
September 17, 1941 was a Wednesday.
Tuesday
September 17th, 1941 fell on a Wednesday.
September 17th, 1988 fell on a Saturday.
September 17th, 1950 fell on a Sunday.
September 6, 2011 was a Tuesday.