Christmas is a holy day of obligation. Since Christmas is Monday, December 25th, the Vigil Mass will be on Sunday at 5:30 p.m. You cannot fulfill your Sunday obligation and the holy day obligation with the 5:30 p.m. Vigil Mass. The last Sunday Mass will be at 11:00 a.m. There will be a Midnight Mass and Mass at 8:00 and 10:00 a.m. on Christmas day.