The acclaimed Conspirare Youth Choirs, directed by Nina Revering, announce their spring concert “Moonrise.”  The program features works by English composer Benjamin Britten in honor of his centenary year, including Missa Brevis in D Op. 63 for treble choir and selected movements from the whimsical suite Friday Afternoons Op.7, written when the composer was in his early twenties. Other selections on the program include the Oscar-winning song “Let It Go” from the hit film Frozen and, ever hopefully, “Singing in the Rain.”