| January | New Year’s Day | 2023-01-01 Sunday | Legal holidays |
| Day After New Year’s Day | 2023-01-03 Tuesday | Legal holidays | |
| Wellington Anniversary Day | 2023-01-23 Monday | Local festivals | |
| Northland Anniversary Day | 2023-01-30 Monday | Local festivals | |
| Auckland Anniversary Day | 2023-01-30 Monday | Local festivals | |
| Nelson Anniversary Day | 2023-01-30 Monday | Local festivals | |
| February | Waitangi Day | 2023-02-06 Monday | Legal holidays |
| Valentine’s Day | 2023-02-14 Tuesday | Holidays or anniversaries | |
| Mar. | Taranaki Anniversary Day | 2023-03-13 Monday | Local festivals |
| Otago Anniversary Day | 2023-03-20 Monday | Local festivals | |
| Apr.; April | April Fools | 2023-04-01 Saturday | Holidays or anniversaries |
| Good Friday | 2023-04-07 Friday | Legal holidays | |
| Holy Saturday | 2023-04-08 Saturday | Holidays or anniversaries | |
| Orthodox Easter Day | 2023-04-09 Sunday | Holidays or anniversaries | |
| Orthodox Easter Monday | 2023-04-10 Monday | Legal holidays | |
| Southland Anniversary Day | 2023-04-11 Tuesday | Local festivals | |
| ANZAC Day | 2023-04-25 Tuesday | Legal holidays | |
| May | Mother’s Day | 2023-05-14 Sunday | Holidays or anniversaries |
| June | The Queen’s Birthday | 2023-06-05 Monday | Legal holidays |
| September | Father’s Day | 2023-09-03 Sunday | Holidays or anniversaries |
| South Canterbury Anniversary Day | 2023-09-25 Monday | Local festivals | |
| October | Hawke’s Bay Anniversary Day | 2023-10-20 Friday | Local festivals |
| Labour Day | 2023-10-23 Monday | Legal holidays | |
| Marlborough Anniversary Day | 2023-10-30 Monday | Local festivals | |
| Halloween | 2023-10-31 Tuesday | Holidays or anniversaries | |
| November | Guy Fawkes Night | 2023-11-05 Sunday | Holidays or anniversaries |
| Canterbury Anniversary Day | 2023-11-17 Friday | Local festivals | |
| Chatham Islands Anniversary Day | 2023-11-27 Monday | Local festivals | |
| December | Westland Anniversary Day | 2023-12-04 Monday | Local festivals |
| Christmas Eve | 2023-12-24 Sunday | Holidays or anniversaries | |
| Christmas Day | 2023-12-25 Monday | Legal holidays | |
| Boxing Day | 2023-12-26 Tuesday | Legal holidays | |
| New Year’s Eve | 2023-12-31 Sunday | Holidays or anniversaries |
