Saturday
It was a Thursday.
20th September 2010 was a Monday.
Sunday
September 18, 1969 was a Thursday.
September 20th, 2003 was a Saturday.
It was a Tuesday
It was a Sunday.
Tuesday
September 24, 1969 was on a Wednesday.
Tuesday, September 23, 1969
Monday the 1st of September 1969.
It was the day when Neil Armstrong landed on the moon and it was a Sunday.