The Holy Trinity Parish Festival Choir sings on special occasions:
Christmas Eve, Palm Sunday, the Sacred Triduum, Easter Sunday,
feast days, holydays, confirmations, sung evening prayer services, and Lenten services. 

The adult choir forms the base of the Festival Choir, but they are joined by members of
the Contemporary Group and parishioners who cannot make a weekly choir rehearsal
commitment and wish to sing only on special occasions.
Rehearsals are Mondays in Harvard at 7:00 PM as needed.