| 1 Jan, 2023 (Sun) | New Year's Day | National holiday |
| 2 Jan, 2023 (Mon) | Day off for New Year's Day | National holiday |
| 27 Jan, 2023 (Fri) | Saint Dévote's Day | National holiday |
| 21 Mar, 2023 (Tue) | March Equinox | Season |
| 26 Mar, 2023 (Sun) | Daylight Saving Time starts | Clock change/Daylight Saving Time |
| 7 Apr, 2023 (Fri) | Good Friday | Observance |
| 8 Apr, 2023 (Sat) | Holy Saturday | Observance |
| 9 Apr, 2023 (Sun) | Easter Sunday | Observance |
| 10 Apr, 2023 (Mon) | Easter Monday | National holiday |
| 1 May, 2023 (Mon) | Labour Day/May Day | National holiday |
| 18 May, 2023 (Thu) | Ascension Day | National holiday |
| 28 May, 2023 (Sun) | Whit Sunday | Observance |
| 29 May, 2023 (Mon) | Whit Monday | National holiday |
| 4 Jun, 2023 (Sun) | Mothers' Day | Observance |
| 8 Jun, 2023 (Thu) | Corpus Christi | National holiday |
| 18 Jun, 2023 (Sun) | Fathers' Day | Observance |
| 21 Jun, 2023 (Wed) | June Solstice | Season |
| 23 Jun, 2023 (Fri) | Saint John's Eve | Observance |
| 24 Jun, 2023 (Sat) | Saint John's Day | Observance |
| 8 Aug, 2023 (Tue) | Feast of Saint Roman Eve | Observance |
| 9 Aug, 2023 (Wed) | Feast of Saint Roman | Observance |
| 15 Aug, 2023 (Tue) | Assumption of Mary | National holiday |
| 23 Sep, 2023 (Sat) | September Equinox | Season |
| 29 Oct, 2023 (Sun) | Daylight Saving Time ends | Clock change/Daylight Saving Time |
| 1 Nov, 2023 (Wed) | All Saints' Day | National holiday |
| 19 Nov, 2023 (Sun) | National Day | National holiday |
| 20 Nov, 2023 (Mon) | Day off for National 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 |
| 31 Dec, 2023 (Sun) | New Year's Eve | Observance |
