| 1 Jan, 2023 (Sun) | New Year | Public Holiday |
| 21 Mar, 2023 (Tue) | March Equinox | Season |
| 26 Mar, 2023 (Sun) | Daylight Saving Time starts | Clock change/Daylight Saving Time |
| 6 Apr, 2023 (Thu) | Maundy Thursday | Public Holiday |
| 7 Apr, 2023 (Fri) | Good Friday | Public Holiday |
| 9 Apr, 2023 (Sun) | Easter Sunday | Public Holiday |
| 10 Apr, 2023 (Mon) | Easter Monday | Public Holiday |
| 25 Apr, 2023 (Tue) | National Flag Day | Public Holiday |
| 5 May, 2023 (Fri) | Prayer Day | Public Holiday |
| 18 May, 2023 (Thu) | Ascension Day | Public Holiday |
| 28 May, 2023 (Sun) | Whit Sunday | Public Holiday |
| 29 May, 2023 (Mon) | Whit Monday | Public Holiday |
| 5 Jun, 2023 (Mon) | Constitution Day | Half-day |
| 21 Jun, 2023 (Wed) | June Solstice | Season |
| 28 Jul, 2023 (Fri) | St. Olav's Eve | Half-day |
| 29 Jul, 2023 (Sat) | St. Olav's Day (National Day) | Public Holiday |
| 23 Sep, 2023 (Sat) | September Equinox | Season |
| 29 Oct, 2023 (Sun) | Daylight Saving Time ends | Clock change/Daylight Saving Time |
| 22 Dec, 2023 (Fri) | December Solstice | Season |
| 24 Dec, 2023 (Sun) | Christmas Eve | Public Holiday |
| 25 Dec, 2023 (Mon) | Christmas Day | Public Holiday |
| 26 Dec, 2023 (Tue) | Boxing Day | Public Holiday |
| 31 Dec, 2023 (Sun) | New Year's Eve | Public Holiday |
