St. Ann’s Catholic Church of Somerville is having several Holy Week services.Holy Thursday Mass will be held on April 2, at 4:30 p.m..Good Friday, April 3, at 7:30 p.m.The Holy Saturday Vigil begins after sundown on April 4, at 8:30 p.m. with the Blessing of Fire in front of St. Ann’s.The Easter Sunday Mass of the Resurrection, will be on April 5, at 10:00 a.m....