Season 0 of thirtysomething premiered on July 16, 2001.

Season 1 of thirtysomething premiered on September 29, 1987.

Season 2 of thirtysomething premiered on December 6, 1988.

Season 3 of thirtysomething premiered on September 19, 1989.

Season 4 of thirtysomething premiered on September 22, 1990.