| 1 Jan, 2023 (Sun) | New Year's Day | Public Holiday |
| 2 Jan, 2023 (Mon) | Day off for New Year's Day | Public Holiday |
| 24 Feb, 2023 (Fri) | Day off for National Remembrance Day In Memory of Late Grand Chief Sir Michael Somare | Public Holiday |
| 26 Feb, 2023 (Sun) | National Remembrance Day In Memory of Late Grand Chief Sir Michael Somare | Public Holiday |
| 21 Mar, 2023 (Tue) | March Equinox | Season |
| 7 Apr, 2023 (Fri) | Good Friday | Public Holiday |
| 8 Apr, 2023 (Sat) | Holy Saturday | Public Holiday |
| 9 Apr, 2023 (Sun) | Easter Sunday | Public Holiday |
| 10 Apr, 2023 (Mon) | Easter Monday | Public Holiday |
| 18 Apr, 2023 (Tue) | Public Holiday | Public Holiday |
| 12 Jun, 2023 (Mon) | Queen Elizabeth II's Birthday | Public Holiday |
| 16 Jun, 2023 (Fri) | King's Birthday | Public Holiday |
| 22 Jun, 2023 (Thu) | June Solstice | Season |
| 23 Jul, 2023 (Sun) | National Remembrance Day | Public Holiday |
| 24 Jul, 2023 (Mon) | Day off for National Remembrance Day | Public Holiday |
| 26 Aug, 2023 (Sat) | National Day of Repentance | Public Holiday |
| 15 Sep, 2023 (Fri) | Day off for Independence Day | Public Holiday |
| 16 Sep, 2023 (Sat) | Independence Day | Public Holiday |
| 23 Sep, 2023 (Sat) | September Equinox | Season |
| 22 Dec, 2023 (Fri) | December Solstice | Season |
| 25 Dec, 2023 (Mon) | Christmas Day | Public Holiday |
| 26 Dec, 2023 (Tue) | Boxing Day | Public Holiday |
