Reference Guide
New Zealand Working Day Rules & Public Holidays Guide
How notice and deadline roles are counted
- Notice (backward): Event/hearing date is excluded; notice deadline is included.
- Deadline (forward): Action/service date is excluded; deadline/event date is included.
- The calculator shows these include/exclude flags on the timeline, exports, and analysis rows.
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Jump straight to the topic you need
The full reference is still available, but you do not need to read it top to bottom. Open the topic that matches your question.
Public Holidays
Start here for nationwide holiday logic, regional anniversaries, and Mondayisation.
Shutdowns & Contracts
Open these sections for year-end closure periods and contract-style date counting.
Planning & Regulatory
Use this when the deadline sits inside RMA or another specialist regulatory workflow.
Māori New Year
Matariki: Aotearoa's Mid-Winter Public Holiday
At-a-Glance
- •First Observed: 24 June 2022
- •Legislation: Te Kāhui o Matariki Public Holiday Act 2022
- •Date Range: Falls between late June and mid-July (set until 2052)
- •Key Point: A unique Māori New Year celebration, now an official public holiday

What Is Matariki?
Matariki is the Māori New Year, celebrated when the Matariki star cluster reappears in the winter sky. It became an official public holiday in 2022, guaranteeing employees a paid day off (or an alternative holiday if they must work). Unlike other public holidays, Matariki doesn't have a fixed date. Instead, the Act legislates specific dates through 2052, with a process to set future dates by Order in Council.
Why It Matters
Matariki is always observed on a Friday, giving many New Zealanders a long weekend in winter. This extra rest day can boost morale, let families spend time together, and encourage local celebrations of Māori culture.
Calculator Tip
The Working Days Calculator automatically excludes Matariki when you select a date range that includes it—no manual calculations needed!
Frequently Asked Questions
Matariki is based on the lunar calendar and the appearance of the Matariki star cluster (Pleiades). The dates vary each year and are determined by astronomical observations and cultural considerations. The Te Kāhui o Matariki Public Holiday Act 2022 sets specific dates through 2052.
The Matariki public holiday date is determined by the Matariki Advisory Committee, which includes experts in mātauranga Māori, astronomy, and maramataka (Māori lunar calendar). The committee recommends dates based on when the Matariki star cluster rises in the mid-winter period.
While the public holiday date is the same nationwide, cultural celebrations may vary by region and iwi. Some regions have their own traditions for celebrating Matariki, and local events may be held on different days around the official holiday.
Public Holidays
How New Zealand Public Holiday Dates Are Determined
At-a-Glance
- •Most NZ public holidays follow fixed statutory rules rather than ad hoc annual decisions
- •Holiday dates fall into four patterns: fixed date, weekday rule, Easter-based, or region-specific
- •Mondayisation changes the observed day for several weekend holidays
- •The calculator applies these rules automatically when building the holiday calendar

NZ public holidays are not all set the same way. Some sit on a fixed date, some are tied to a weekday pattern, some depend on Easter or Matariki, and regional anniversaries follow their own local rules. This section maps the rule types rather than expecting users to memorise every holiday one by one.
Rule Families
Fixed-date holidays
New Year's Day, Waitangi Day, ANZAC Day, Christmas Day, and Boxing Day start from a fixed calendar date, then may shift under Mondayisation rules.
Weekday-rule holidays
King's Birthday and Labour Day are always tied to a particular Monday pattern rather than a fixed date.
Movable religious or lunar holidays
Good Friday and Easter Monday move with Easter. Matariki is set from the Maori lunar calendar and the official government schedule.
Regional anniversary rules
Regional holidays often use proximity rules like "closest Monday" or a named weekday near a historical date.
Most common trap points: Mondayisation, Easter-based movement, and region-specific anniversary rules. Those are the places where a working-day result most often differs from a simple calendar count.
Statutory Public Holidays
These nationwide holidays apply across NZ. Open the table when you need the exact rule or observation note.
View statutory holiday rule table
| Holiday Name | Rule for Determination | Notes on Observation |
|---|---|---|
| New Year's Day | January 1st | Mondayised. If Jan 1st is a Saturday, observed on Monday. If Jan 1st is a Sunday, observed on Tuesday (due to Day after New Year's taking Monday). |
| Day after New Year's Day | January 2nd | Mondayised. If Jan 2nd is a Saturday, observed on Monday. If Jan 2nd is a Sunday, observed on Tuesday. Can be "Tuesdayised" if Jan 1st was Mondayised. |
| Waitangi Day | February 6th | Mondayised since 2014. If Feb 6th is a Saturday or Sunday, observed on the following Monday. |
| Good Friday | Friday before Easter Sunday | Date varies annually based on ecclesiastical rules (first Sunday after the first full moon on or after the March equinox). |
| Easter Monday | Monday after Easter Sunday | Date varies annually based on Easter Sunday date. |
| ANZAC Day | April 25th | Mondayised since 2014. If Apr 25th is a Saturday or Sunday, observed on the following Monday. |
| King's Birthday | First Monday in June | Always falls on a Monday. Was Queen's Birthday from 1952-2022. |
| Matariki | Varies annually (late June/early July) | Based on the Māori lunar calendar, specifically the rising of the Matariki star cluster. Dates are set by the government and known up to 2052. |
| Labour Day | Fourth Monday in October | Always falls on a Monday. |
| Christmas Day | December 25th | Mondayised. If Dec 25th is a Saturday, observed on Monday. If Dec 25th is a Sunday, observed on Tuesday (due to Boxing Day taking Monday). |
| Boxing Day | December 26th | Mondayised. If Dec 26th is a Saturday, observed on Monday. If Dec 26th is a Sunday, observed on Tuesday. Can be "Tuesdayised" if Dec 25th was Mondayised. |
Regional Anniversary Days
Regional anniversaries are the least uniform part of the NZ holiday calendar. Open the table when you need the exact rule for a selected province.
View regional anniversary rule table
| Region Name (Code) | Rule for Determination |
|---|---|
| Auckland (AUK) | Closest Monday to January 29th |
| Canterbury (CAN) | Second Friday after the first Tuesday in November (Show Day) |
| Chatham Islands (CIT) | Closest Monday to November 30th |
| Hawke's Bay (HKB) | Friday before Labour Day |
| Marlborough (MBH) | First Monday after Labour Day |
| Nelson (NSN) | Closest Monday to February 1st |
| Otago (OTA) | Closest Monday to March 23rd (if this falls on Easter Monday, observed on Tuesday) |
| South Canterbury (STC) | Fourth Monday in September (Dominion Day) |
| Southland (STL) | Easter Tuesday (since 2012) |
| Taranaki (TKI) | Second Monday in March |
| Wellington (WGN) | Closest Monday to January 22nd |
| Westland (WTC) | Closest Monday to December 1st |
Mondayisation Explained
Why it exists
Mondayisation ensures people who do not usually work weekends still receive the benefit of weekend holidays.
Which holidays it changes
Waitangi Day, ANZAC Day, Christmas Day, Boxing Day, New Year's Day, and the day after New Year's Day.
For the full weekend-to-observed-day logic, use the dedicated Mondayisation section.
Calculator Boundary
The calculator generates the holiday calendar from these rule types for past and future years. Matariki remains the main exception, because only officially announced dates can be loaded beyond the current published schedule.
Frequently Asked Questions
Some holidays like Easter are based on lunar calendars and change annually. Others like King's Birthday are set to specific days of the week (e.g., first Monday in June) rather than fixed calendar dates. Regional anniversaries often use rules like 'closest Monday to a historical date' to create long weekends.
When Waitangi Day, ANZAC Day, Christmas Day, Boxing Day, New Year's Day, or the day after New Year's Day fall on a weekend, they are 'Mondayised' (observed on the following Monday or Tuesday) for employees who don't normally work weekends. The calculator automatically applies these rules.
Most holiday dates can be calculated years in advance because they follow fixed rules. The exception is Matariki, which is based on the Māori lunar calendar and officially announced by the government. Currently, Matariki dates are known up to 2052.
Topic
Regional Anniversaries
Which regional anniversary holidays matter, where they differ, and when a regional selection changes the count.
Topic
Mondayisation
How weekend public holidays move in practice and what that does to working-day calculations.
Topic
Summer Shutdown
Year-end shutdown windows used in legal and commercial planning, and how they interact with ordinary working-day counts.
Topic
Christmas & New Year
The practical holiday-treatment questions around late December and early January dates in New Zealand.
Topic
Section 54
How Section 54 influences legal and contractual date counting, and where users still need to read the governing wording.
Topic
RMA Working Days
RMA-specific working-day logic for planning and regulatory deadlines that do not follow ordinary business-day assumptions.





