Feast Day: December 25
Solemnity of the Nativity of the Lord. Holyday of Obligation. Four Mass formularies are provided: Vigil, Mass during the Night, Mass at Dawn, and Mass during the Day. Begins the Octave of Christmas (USCCB Liturgical Calendar 2026).
Saints Commemorated on December 25
From the USCCB 2026 Liturgical Calendar.