quinquennial

Happening once every five years.

Lasting for five years.

A fifth anniversary.

A period of five years.

Occurring once in five years.

Recurring in the fifth year, reckoning both years of occurrence; occurring every fourth year. See II., 2.

Lasting five years.

A period of five years; a quinquenniad; hence, something characterized by such a period or interval, as an anniversary, or a college catalogue.

A festival or celebration occurring once in four years; an anniversary in the fifth year.

Occurring once in five years, or at the end of every five years; also, lasting five years. A quinquennial event.