Tuesday
The last day of September can be any day of the week
The day of the week for September 11 1998 is Friday
The day of the week for September 21, 1978 was a Thursday.
What day of the week was September 28, 2009?September 28, 2009 was on a Monday.
The correct day of the week for September 22 1947 is Monday
September is a whole months, so it couldn't have fallen on any day of the week. The first day of September (in 1994) was on Thursday, and the 30th was on a Friday.
September 11th can be on any day of the week
The day of the 24th september 1956 is a monday
The Hogwarts Express always leaves on the 1st September no matter what day of the week it is.
September featured all the days of the week that year.
Friday
This day was a Saturday.