Date | Commemoration | Type | Anniversary |
| 01.09 | Birth of Pope Gregory XV (1554) | Pope | 450 years |
| 01.21 | Death of Vladimir Lenin (1924) | Person | 80 years |
| 02.01 | Disintegration of Space Shuttle Columbia (2003) | World Event | 1 year |
| 02.02 | Establishment of the Pontifical Commission for Social Communications (1964) | Church Event | 40 years |
| 02.06 | Founding of the first diocese in the Philippines (1579) | Church Event | 425 years |
| 02.10 | Death of Pope Leo XII (1829) | Pope | 175 years |
| 02.11 | Signing of the Lateran Treaty, Establishment of the State of Vatican City (1929) | Church Event | 75 years |
| 02.11 | Establishment of the Catholic hierarchy in Russia (2002) | Church Event | 2 years |
| 02.15 | Destruction of the Abbey of Monte Cassino (1944) | Church Event | 60 years |
| 02.21 | Creation of Jorge Bergoglio as Cardinal (2001) | Pope | 3 years |
| 02.23 | Beginning of the Darfur Genocide (2003) | World Event | 1 year |
| 03.12 | Death of Pope Gregory I (604) | Pope | 1400 years |
| 03.14 | Establishment of the Catholic hierarchy in Namibia (1994) | Church Event | 10 years |
| 03.25 | Consecration of Russia and the world to the Immaculate Heart of Mary (1984) | Church Event | 20 years |
| 03.25 | Encyclical Evangelium vitæ (1995) | Papal Document | 9 years |
| 03.31 | Election of Pope Pius VIII (1829) | Pope | 175 years |
| 04.07 | Beginning of the Rwandan Genocide (1994) | World Event | 10 years |
| 04.11 | Establishment of the International Theological Commission (1969) | Church Event | 35 years |
| 04.12 | Sack of Constantinople (1204) | World Event | 800 years |
| 04.17 | Encyclical Ecclesia de Eucharistia (2003) | Papal Document | 1 year |
| 04.25 | Establishment of the Catholic hierarchy in Malawi and Zambia (1959) | Church Event | 45 years |
| 04.25 | Carnation Revolution in Lisbon (1974) | World Event | 30 years |
| 05.07 | End of Battle of Điện Biên Phủ in Vietnam (1954) | World Event | 50 years |
| 05.08 | Establishment of the Sacred Congregation for the Causes of Saints (1969) | Church Event | 35 years |
| 05.15 | Opening of the First Council of China (1924) | Church Event | 80 years |
| 05.19 | Establishment of the Secretariat for Non-Christians (1964) | Church Event | 40 years |
| 05.25 | Encyclical Ut unum sint (1995) | Papal Document | 9 years |
| 06.06 | D-Day (1944) | World Event | 60 years |
| 06.12 | Closing of the First Council of China (1924) | Church Event | 80 years |
| 06.28 | Assassination of Archduke Franz Ferdinand of Austria (1914) | World Event | 90 years |
| 07.16 | Excommunication of Patriarch Cerularius of Constantinope (1054) | Church Event | 950 years |
| 07.28 | Beginning of World War I (1914) | World Event | 90 years |
| 08.10 | Sacerdotal Ordination of Pope John XXIII (1904) | Pope | 100 years |
| 08.20 | Death of Pope Pius X (1914) | Pope | 90 years |
| 08.21 | Apparition of Our Lady of Knock (1879) | Marian Apparition | 125 years |
| 09.03 | Election of Pope Benedict XV (1914) | Pope | 90 years |
| 09.14 | Encyclical Fides et ratio (1998) | Papal Document | 6 years |
| 10.24 | Beginning of the Wall Street Crash of 1929 (1929) | World Event | 75 years |
| 11.01 | Encyclical Ad beatissimi Apostolorum Principis (1914) | Papal Document | 90 years |
| 11.10 | Establishment of the Catholic hierarchy in Burundi and Rwanda (1959) | Church Event | 45 years |
| 11.15 | Founding of the first dioceses in America (1504) | Church Event | 500 years |
| 11.21 | Birth of Pope Benedict XV (1854) | Pope | 150 years |
| 11.21 | Conciliar Constitution Lumen gentium (1964) | Conciliar Document | 40 years |
| 11.21 | Conciliar Decree Orientalium Ecclesiarum (1964) | Conciliar Document | 40 years |
| 11.21 | Conciliar Decree Unitatis redintegratio (1964) | Conciliar Document | 40 years |
| 11.28 | Last Apparition of Our Lady of Kibeho (1989) | Marian Apparition | 15 years |
| 12.02 | Coronation of Napoleon by Pope Pius VII (1804) | World Event | 200 years |
| 12.08 | Definition of the Dogma of the Immaculate Conception (1854) | Church Event | 150 years |
| 12.09 | Death of Archbishop Fulton Sheen (1979) | Person | 25 years |
| 12.10 | Consecration of Basilica of St. Paul outside the Walls (1854) | Church Event | 150 years |
| 12.12 | Episcopal consecration of Pope Paul VI (1954) | Pope | 50 years |
| 12.13 | Sacerdotal Ordination of Jorge Bergoglio (1969) | Pope | 35 years |
| 12.14 | Death of Mélanie Calvat of La Salette (1904) | Person | 100 years |
| 12.20 | Sacerdotal Ordination of Pope Pius XI (1879) | Pope | 125 years |
| 12.25 | Solemn Convocation of the Second Vatican Council (1959) | Ecumenical Council | 45 years |
