 | 2039 | 2040 | 2041 |  |
Date | Commemoration | Type | Anniversary |
| 01.12 | Earthquake at Port-au-Prince (2010) | World Event | 30 years |
| 02.06 | Death of Pope Clement XII (1740) | Pope | 300 years |
| 02.06 | Founding of New Zealand (1840) | World Event | 200 years |
| 02.12 | Beheading of 21 Coptic Martyrs in Sirte, Libya (2015) | World Event | 25 years |
| 03.13 | Birth of Pope Innocent XII (1615) | Pope | 425 years |
| 03.17 | Discovery of Catholic Followers in Japan (1865) | Church Event | 175 years |
| 03.25 | Encyclical Evangelium vitæ (1995) | Papal Document | 45 years |
| 03.29 | Rededication of England as the Dowry of Mary (2020) | Church Event | 20 years |
| 04.02 | Death of Pope John Paul II (2005) | Pope | 35 years |
| 04.15 | First Apparition of Our Lady of Cuapa (1980) | Marian Apparition | 60 years |
| 04.18 | Establishment of the Catholic hierarchy in Nigeria, Ghana, Cameroon and Sierra Leone (1950) | Church Event | 90 years |
| 04.19 | Election of Pope Benedict XVI (2005) | Pope | 35 years |
| 04.24 | Beginning of the Armenian Genocide (1915) | World Event | 125 years |
| 05.01 | Rededication of USA and Canada to Mary, Mother of the Church (2020) | Church Event | 20 years |
| 05.01 | Dedication of Italy to the Immaculate Heart of Mary (2020) | Church Event | 20 years |
| 05.24 | Encyclical Laudato si’ (2015) | Papal Document | 25 years |
| 05.25 | Encyclical Ut unum sint (1995) | Papal Document | 45 years |
| 06.05 | Establishment of the Secretariat on Christian Unity (1960) | Church Event | 80 years |
| 06.25 | Beginning of the Korean War (1950) | World Event | 90 years |
| 06.30 | Establishment of the Pontifical Council for the Promotion of the New Evangelization (2010) | Church Event | 30 years |
| 07.13 | Birth of Pope Clement X (1590) | Pope | 450 years |
| 08.17 | Election of Pope Benedict XIV (1740) | Pope | 300 years |
| 08.27 | Death of Pope Sixtus V (1590) | Pope | 450 years |
| 09.03 | Election of Pope Gregory I (590) | Pope | 1450 years |
| 09.04 | Establishment of the Catholic hierarchy in Mozambique (1940) | Church Event | 100 years |
| 09.15 | Election of Pope Urban VII (1590) | Pope | 450 years |
| 09.18 | Birth of Pope Gregory XVI (1765) | Pope | 275 years |
| 09.27 | Establishment of the Society of Jesus (Jesuits) (1540) | Church Event | 500 years |
| 09.27 | Death of Pope Urban VII (1590) | Pope | 450 years |
| 09.29 | Election of Pope Leo I (440) | Pope | 1600 years |
| 10.03 | German Reunification Day (1990) | World Event | 50 years |
| 10.13 | Last Apparition of Our Lady of Cuapa (1980) | Marian Apparition | 60 years |
| 10.28 | Conciliar Decree Christus Dominus (1965) | Conciliar Document | 75 years |
| 10.28 | Conciliar Decree Perfectæ caritatis (1965) | Conciliar Document | 75 years |
| 10.28 | Conciliar Decree Optatam totius (1965) | Conciliar Document | 75 years |
| 10.28 | Conciliar Declaration Gravissimum educationis (1965) | Conciliar Document | 75 years |
| 10.28 | Conciliar Declaration Nostra ætate (1965) | Conciliar Document | 75 years |
| 10.31 | Terrorist Attack on Syriac Cathedral of Our Lady of Salvation (2010) | World Event | 30 years |
| 11.01 | Definition of the Dogma of the Assumption of the Blessed Virgin Mary (1950) | Church Event | 90 years |
| 11.07 | Dedication of the Basilica of the Holy Family, Barcelona (2010) | Church Event | 30 years |
| 11.13 | Paris terrorist attacks (2015) | World Event | 25 years |
| 11.18 | Conciliar Constitution Dei verbum (1965) | Conciliar Document | 75 years |
| 11.18 | Conciliar Decree Apostolicam actuositatem (1965) | Conciliar Document | 75 years |
| 11.18 | Letter of Reconciliation of the Polish Bishops to the German Bishops (1965) | Church Event | 75 years |
| 11.24 | Establishment of the Catholic hierarchy in Vietnam (1960) | Church Event | 80 years |
| 12.05 | Election of Pope Gregory XIV (1590) | Pope | 450 years |
| 12.07 | Conciliar Constitution Gaudium et spes (1965) | Conciliar Document | 75 years |
| 12.07 | Conciliar Decree Ad gentes (1965) | Conciliar Document | 75 years |
| 12.07 | Conciliar Decree Presbyterorum ordinis (1965) | Conciliar Document | 75 years |
| 12.07 | Conciliar Declaration Dignitatis humanæ (1965) | Conciliar Document | 75 years |
| 12.07 | Joint Declaration between Pope Paul VI and Ecumenical Patriarch Athenagoras I (1965) | Church Event | 75 years |
| 12.08 | Closing of the Second Vatican Council (1965) | Ecumenical Council | 75 years |
| 12.09 | Death of Pope Pius IV (1565) | Pope | 475 years |
| 12.18 | Establishment of the Catholic hierarchy in Tunisia (1965) | Church Event | 75 years |
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