Friday, January 1st, 2021
Solemnity of Mary, Mother of God
Obligatory in 2021?  YES

Thursday, May 13th, 2021
Ascension of Jesus
Obligatory in 2021?  YES

Sunday, August 15th, 2021
Assumption of the Blessed Virgin Mary
Obligatory in 2021?  YES

Monday, November 1st, 2021
All Saints' Day
Obligatory in 2021?  NO

Wednesday, December 8th, 2021
The Immaculate Conception of the Blessed Virign Mary
Obligatory in 2021?  YES

Saturday, December 25th, 2021
Christmas Day
Obligatory in 2021?  YES

Notes

The number of Days of Obligation vary from year to year, because the precept to attend Mass is lifted (abrogated) if any of the following days:

• 1 January (Solemnity of Mary, Mother of God),
• 15 August (Feast of the Assumption),
• 1 November (Solemnity of All Saints)

The faithful, however, are encouraged to attend Mass on those days. This was decided by the National Conference of Catholic Bishops of the United States of America on December 13, 1991 (Canon 1246) and is effective as of January 1, 1993.

Ascension Thursday is a Holy Day of Obligation in the entirety of the following States: Massachusetts, Rhode Island, Connecticut, New York, New Jersey, Pennsylvania, and Nebraska.

In Hawaii since 1992 the only observed Days of Holy Obligation (except Sundays) are Feast of the Immaculate Conception and Christmas.