| 1 Jan, 2023 (Sun) | New Year's Day | National holiday |
| 14 Feb, 2023 (Tue) | Valentine's Day | Observance |
| 21 Feb, 2023 (Tue) | Carnival / Shrove Tuesday / Pancake Day | Optional Holiday |
| 19 Mar, 2023 (Sun) | St. Joseph's Day | District Holiday |
| 19 Mar, 2023 (Sun) | Fathers' Day | Observance |
| 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 | National holiday |
| 9 Apr, 2023 (Sun) | Easter Sunday | National holiday |
| 25 Apr, 2023 (Tue) | Liberty Day | National holiday |
| 25 Apr, 2023 (Tue) | Our Lady of Mércoles | District Holiday |
| 1 May, 2023 (Mon) | Labor Day / May Day | National holiday |
| 7 May, 2023 (Sun) | Mothers' Day | Observance |
| 12 May, 2023 (Fri) | St. Joana's Day | District Holiday |
| 18 May, 2023 (Thu) | Ascension Day | District Holiday |
| 22 May, 2023 (Mon) | Leiria Day | District Holiday |
| 23 May, 2023 (Tue) | Portalegre Day | District Holiday |
| 29 May, 2023 (Mon) | Azores Day | Regional Holiday |
| 8 Jun, 2023 (Thu) | Corpus Christi | National holiday |
| 10 Jun, 2023 (Sat) | Portugal Day | National holiday |
| 13 Jun, 2023 (Tue) | St. Anthony's Day | District Holiday |
| 21 Jun, 2023 (Wed) | June Solstice | Season |
| 24 Jun, 2023 (Sat) | St. John's Day | District Holiday |
| 29 Jun, 2023 (Thu) | St. Peter's Day | District Holiday |
| 1 Jul, 2023 (Sat) | Madeira Day | Regional Holiday |
| 4 Jul, 2023 (Tue) | St. Elizabeth's Day | District Holiday |
| 15 Aug, 2023 (Tue) | Assumption of Mary | National holiday |
| 20 Aug, 2023 (Sun) | Our Lady of Sorrows | District Holiday |
| 22 Aug, 2023 (Tue) | Our Lady of Graces | District Holiday |
| 7 Sep, 2023 (Thu) | Faro Day | District Holiday |
| 15 Sep, 2023 (Fri) | Birth of Bocage | District Holiday |
| 21 Sep, 2023 (Thu) | St. Matthew's Day | District Holiday |
| 23 Sep, 2023 (Sat) | September Equinox | Season |
| 5 Oct, 2023 (Thu) | Republic Day | National holiday |
| 29 Oct, 2023 (Sun) | Daylight Saving Time ends | Clock change/Daylight Saving Time |
| 1 Nov, 2023 (Wed) | All Saints' Day | National holiday |
| 27 Nov, 2023 (Mon) | Foral of Sancho I | District Holiday |
| 1 Dec, 2023 (Fri) | Restoration of Independence | 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 |
