Date | Commemoration | Type | Anniversary |
| 01.01 | Establishment of the Catholic hierarchy in Myanmar (1955) | Church Event | 90 years |
| 01.01 | Establishment of the Catholic hierarchy in Zimbabwe (1955) | Church Event | 90 years |
| 02.11 | Establishment of the Pontifical Commission for the Pastoral Assistance to Health Care Workers (1985) | Church Event | 60 years |
| 02.12 | Beheading of 21 Coptic Martyrs in Sirte, Libya (2015) | World Event | 30 years |
| 02.13 | Death of Sister Lúcia dos Santos, Fatima visionary (2005) | Person | 40 years |
| 03.25 | Encyclical Evangelium vitæ (1995) | Papal Document | 50 years |
| 03.29 | Rededication of England as the Dowry of Mary (2020) | Church Event | 25 years |
| 04.02 | Death of Pope John Paul II (2005) | Pope | 40 years |
| 04.16 | Beginning of the Battle of Berlin (1945) | World Event | 100 years |
| 04.17 | Beginning of the Cambodian Genocide (1975) | World Event | 70 years |
| 04.19 | Election of Pope Benedict XVI (2005) | Pope | 40 years |
| 04.28 | Death of Benito Mussolini (1945) | Person | 100 years |
| 04.29 | Election of Pope Clement X (1670) | Pope | 375 years |
| 04.30 | Suicide of Adolf Hitler (1945) | World Event | 100 years |
| 04.30 | Fall of Saigon (1975) | World Event | 70 years |
| 05.01 | Rededication of USA and Canada to Mary, Mother of the Church (2020) | Church Event | 25 years |
| 05.01 | Dedication of Italy to the Immaculate Heart of Mary (2020) | Church Event | 25 years |
| 05.08 | Birth of Archbishop Fulton Sheen (1895) | Person | 150 years |
| 05.08 | Victory in Europe Day (1945) | World Event | 100 years |
| 05.10 | Founding of the first diocese in Argentina (1570) | Church Event | 475 years |
| 05.18 | Birth of Pope John Paul II (1920) | Pope | 125 years |
| 05.24 | Encyclical Laudato si’ (2015) | Papal Document | 30 years |
| 05.25 | Encyclical Ut unum sint (1995) | Papal Document | 50 years |
| 05.29 | Sacerdotal Ordination of Pope Paul VI (1920) | Pope | 125 years |
| 06.12 | Union of Brest (1595) | Church Event | 450 years |
| 06.28 | Opening of the First Council of Lyons (1245) | Ecumenical Council | 800 years |
| 07.05 | Closing of the First Council of Lyons (1245) | Ecumenical Council | 800 years |
| 07.11 | Beginning of the Bosnian Genocide (1995) | World Event | 50 years |
| 07.14 | Apostolic Constitution Quo Primum (1570) | Papal Document | 475 years |
| 07.18 | Declaration of papal infallibility by the First Vatican Council (1870) | Church Event | 175 years |
| 07.27 | Consecration of Poland to the Sacred Heart of Jesus (1920) | Church Event | 125 years |
| 08.06 | Dropping of Atomic Bomb in Hiroshima (1945) | World Event | 100 years |
| 08.09 | Dropping of Atomic Bomb in Nagasaki (1945) | World Event | 100 years |
| 08.17 | Proclamation of Indonesian Independence (1945) | World Event | 100 years |
| 09.02 | End of World War II (1945) | World Event | 100 years |
| 09.02 | Independence Day of Vietnam (1945) | World Event | 100 years |
| 09.14 | Establishment of the Catholic hierarchy in Cote d’Ivoire, Central African Republic, Guinea, Gabon, Congo-Brazzaville, Mali, Madagascar, Chad and Togo (1955) | Church Event | 90 years |
| 10.20 | Adjournment of the First Vatican Council (1870) | Ecumenical Council | 175 years |
| 10.28 | Conciliar Decree Christus Dominus (1965) | Conciliar Document | 80 years |
| 10.28 | Conciliar Decree Perfectæ caritatis (1965) | Conciliar Document | 80 years |
| 10.28 | Conciliar Decree Optatam totius (1965) | Conciliar Document | 80 years |
| 10.28 | Conciliar Declaration Gravissimum educationis (1965) | Conciliar Document | 80 years |
| 10.28 | Conciliar Declaration Nostra ætate (1965) | Conciliar Document | 80 years |
| 11.01 | Beginning of the Vietnam war (1955) | World Event | 90 years |
| 11.13 | Paris terrorist attacks (2015) | World Event | 30 years |
| 11.18 | Conciliar Constitution Dei verbum (1965) | Conciliar Document | 80 years |
| 11.18 | Conciliar Decree Apostolicam actuositatem (1965) | Conciliar Document | 80 years |
| 11.18 | Letter of Reconciliation of the Polish Bishops to the German Bishops (1965) | Church Event | 80 years |
| 11.20 | Death of Francisco Franco (1975) | Person | 70 years |
| 11.27 | Declaration of the First Crusade by Pope Urban II (1095) | Church Event | 950 years |
| 12.07 | Conciliar Constitution Gaudium et spes (1965) | Conciliar Document | 80 years |
| 12.07 | Conciliar Decree Ad gentes (1965) | Conciliar Document | 80 years |
| 12.07 | Conciliar Decree Presbyterorum ordinis (1965) | Conciliar Document | 80 years |
| 12.07 | Conciliar Declaration Dignitatis humanæ (1965) | Conciliar Document | 80 years |
| 12.07 | Joint Declaration between Pope Paul VI and Ecumenical Patriarch Athenagoras I (1965) | Church Event | 80 years |
| 12.08 | Closing of the Second Vatican Council (1965) | Ecumenical Council | 80 years |
| 12.13 | Opening of the Council of Trent (1545) | Ecumenical Council | 500 years |
| 12.18 | Establishment of the Catholic hierarchy in Tunisia (1965) | Church Event | 80 years |
| 12.25 | Encyclical Deus caritas est (2005) | Papal Document | 40 years |
