The Harvard Opportunes, the university's oldest co-ed a cappella group, will perform a mix of classic and popular songs in a concert at 2 p.m. Sunday, April 6, at the Darien Library.

In 1980, two Harvard-Radcliffe students, Simin Yazdgerdi and Suzanne Goldsmith, transformed a loosely organized co-ed singing group called the Harvard Squares into Harvard's first full-fledged mixed a cappella ensemble now known as the Harvard Opportunes.

Over the years, the Harvard Opportunes have won widespread acclaim for its intricate six- to eight-part harmonies as well as for the members' stage presence and sense of humor.

Though all are seasoned musicians, the Opportunes have academic concentrations spanning Harvard's diverse curriculum, from molecular and cellular biology to social studies to English. Their members hail from all over the country and the world and are involved in Harvard athletics, clubs, theater, publications and service programs.

The Darien Library, 1441 Post Road, can be reached at or 203-655-1234.