Ken Olin series about baby boomers

• TV series: 1987-91
• Definitely old enough to know better
• Many a millennial, now
• Hit 1980's-90's series
• Imprecise age
• One approaching middle age
• Bouncing in might try those of a certain age

Longman Dictionary of Contemporary English Word definitions in Longman Dictionary of Contemporary English
noun EXAMPLES FROM CORPUS ▪ As a twentysomething, I could see these thirtysomethings thought they had problems.

Wiktionary Word definitions in Wiktionary
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.