The answer is Friday
September 29 1988 was a Thursday.
September 12 1988 was a Monday.
20 September 1988 was on a Tuesday.
September 28th 1988 was a Wednesday.
September 1st, 1988 fell on a Thursday.
It was a Sunday.
Super Password - 1984 1988-09-02 was released on: USA: 2 September 1988
Good Day New York - 1988 1994-02-02 was released on: USA: 2 February 1994
September 2, 1988 fell on a Friday.
September 24, 1988 fell on a Saturday.
September 18, 1988 fell on a Sunday.
September 6, 1988 fell on a Tuesday.