September 11, 2001 fell on a Tuesday, so most children would have had school that day. Some schools may have decided to close early, and some ofthe ones on the west coast might have closed for the day (due to the time difference, it was still very early morning there when the attacks started unfolding so the kids hadn't even gone to school yet). Personally, I was in school when the attacks happened and they didn't close school. Some parents decided to pick their children up early, but the school still stayed open. However, they did close school the next day.
Around Aug 16th - September 11
The day of the week for September 11 1998 is Friday
September 11, 2011 is a Sunday.
Tuesday was the day of September 11 in 2001.
11 September 1996 was a Wednesday.
September 11 1957 was on a Wednesday.
11 September 1965 was a Saturday.
September 11, 1987 was a Friday.
September 11, 1982 was a Saturday.
September 11 1956 was a Tuesday.
September 11, 2001 was a Tuesday.
September 11 1955 was a Sunday