December 21
December 21 is the optional memorial of Saint Peter Canisius, Priest and Doctor of the Church in the Church’s calendar for the United States.
On the calendar for December 21
Saint Peter Canisius, Priest and Doctor of the Church
Optional MemorialWhite
Saint profile for December 21
December 21 in 2026, 2027 and 2028
A Sunday, a season or a greater feast can take the place of a memorial, so what is celebrated on this date changes from year to year.
Monday, December 21, 2026
Monday of the Fourth Week of Advent
WeekdayViolet
Not celebrated this year: Saint Peter Canisius, Priest and Doctor of the Church
One of the days of the O Antiphons, the final week of preparation before the Nativity.
Readings for December 21, 2026Tuesday, December 21, 2027
Tuesday of the Fourth Week of Advent
WeekdayViolet
Not celebrated this year: Saint Peter Canisius, Priest and Doctor of the Church
One of the days of the O Antiphons, the final week of preparation before the Nativity.
Readings for December 21, 2027Thursday, December 21, 2028
Thursday of the Third Week of Advent
WeekdayViolet
Not celebrated this year: Saint Peter Canisius, Priest and Doctor of the Church
One of the days of the O Antiphons, the final week of preparation before the Nativity.
Readings for December 21, 2028
Celebrations are from the General Roman Calendar and the proper calendar for the dioceses of the United States, computed as described on the liturgical calendar. Your diocese or religious community may keep its own proper celebrations on this date. Saint profiles are listed under every date their own feast-day line gives.
