Several special Masses and concerts are scheduled this weekend to observe Good Friday and the Easter holiday. On Friday, April 14 the Trinity College Concert Choir and the Connecticut College Chamber chorus present the Bach B-Minor Mass at the Trinity College Chapel in Hartford at 8 p.m. The concert is conducted by Professor Gerald Moshell and features a professional orchestra and student soloists. The College Chapel is on the campus of Trinity College, 300 Summit St., in Hartford Also on Friday, the combined choirs of First Church of Christ in Wethersfield, Bethany Covenant Church in Berlin and the Festival Orchestra under the direction of David Spicer perform "The Passion According to Saint John" by Johann Sebastian Bach at First Church of Christ in observance of Good Friday. The free concert starts at 7 p.m. Child care is provided for those under 8. The church is at 250 Main St., Wethersfield. For more information, call 860-529-1575, or visit the website www.firstchurch.org. An Easter Sunday Concert is set for the Cathedral of St. Joseph in Hartford at 10 a.m. featuring the Soli Deo Gloria Orchestra. The free performance is open to the public, preceding a Mass at 11 a.m. The cathedral is at 140 Farmington Ave., Hartford.