| 1 Jan, 2023 (Sun) | New Year's Day | National holiday |
| 6 Jan, 2023 (Fri) | Epiphany | National holiday |
| 5 Feb, 2023 (Sun) | Feast of St Agatha | National holiday |
| 15 Mar, 2023 (Wed) | Mothers' Day | Observance |
| 19 Mar, 2023 (Sun) | Fathers' Day | Observance |
| 21 Mar, 2023 (Tue) | March Equinox | Season |
| 25 Mar, 2023 (Sat) | Anniversary of the Arengo | National holiday |
| 26 Mar, 2023 (Sun) | Daylight Saving Time starts | Clock change/Daylight Saving Time |
| 1 Apr, 2023 (Sat) | Investiture Ceremony of the Captains Regent 1 | National holiday |
| 7 Apr, 2023 (Fri) | Good Friday | Observance |
| 8 Apr, 2023 (Sat) | Holy Saturday | Observance |
| 9 Apr, 2023 (Sun) | Easter Sunday | National holiday |
| 10 Apr, 2023 (Mon) | Easter Monday | National holiday |
| 1 May, 2023 (Mon) | Labour Day/May Day | National holiday |
| 8 Jun, 2023 (Thu) | Corpus Christi | National holiday |
| 21 Jun, 2023 (Wed) | June Solstice | Season |
| 28 Jul, 2023 (Fri) | Anniversary of the Fall of the Fascist Government | National holiday |
| 15 Aug, 2023 (Tue) | Assumption of Mary | National holiday |
| 3 Sep, 2023 (Sun) | The Feast of St Marinus and Republic Day | National holiday |
| 23 Sep, 2023 (Sat) | September Equinox | Season |
| 1 Oct, 2023 (Sun) | Investiture Ceremony of the Captains Regent 2 | National holiday |
| 29 Oct, 2023 (Sun) | Daylight Saving Time ends | Clock change/Daylight Saving Time |
| 1 Nov, 2023 (Wed) | All Saints' Day | National holiday |
| 2 Nov, 2023 (Thu) | All Souls' Day | National holiday |
| 8 Dec, 2023 (Fri) | Feast of the Immaculate Conception | National holiday |
| 22 Dec, 2023 (Fri) | December Solstice | Season |
| 24 Dec, 2023 (Sun) | Christmas Eve | Observance |
| 25 Dec, 2023 (Mon) | Christmas Day | National holiday |
| 26 Dec, 2023 (Tue) | Boxing Day | National holiday |
| 31 Dec, 2023 (Sun) | New Year's Eve | Observance |
