What is "thirtysomething"

a. 1 Between 30 and 39 years of age. 2 Between 30 and 39 in number. n. A person whose age is between thirty and thirty-nine years, inclusive; someone in his or her thirties.

Thirtysomething (usually styled thirtysomething) is an American television drama about American baby boomers (in Philadelphia, Pennsylvania) who are now in their thirties. Running from 1987 to 1991 (during the presidencies of Ronald Reagan and George H.W. Bush, as well as the Gulf War), the series examines how this group of friends learns to negotiate their prior involvement with the early 1970s counterculture as young adults, in contrast to the yuppie lifestyle which dominated American culture during the 1980s.

The title of the show was designed as thirtysomething (with a lowercase "t") by Kathie Broyles, who combined the words of the original title, Thirty Something. It premiered in the United States on September 29, 1987, and lasted four seasons until it was cancelled in May 1991, partly due to low ratings and partly due to the desire of the creators and cast to move on to new projects.