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Reference Guide

New Zealand Working Day Rules & Public Holidays Guide

Use this New Zealand working day guide to understand how the calculator handles statutory holidays, regional anniversaries, mondayisation, summer shutdowns, and NZ-specific counting rules. For a focused explainer, read the mondayisation guide. For scenario walkthroughs, visit Use Cases.

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.

Start Here

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
Matariki constellation

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
Visual representation of New Zealand holiday determination rules

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 NameRule for DeterminationNotes on Observation
New Year's DayJanuary 1stMondayised. 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 DayJanuary 2ndMondayised. 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 DayFebruary 6thMondayised since 2014. If Feb 6th is a Saturday or Sunday, observed on the following Monday.
Good FridayFriday before Easter SundayDate varies annually based on ecclesiastical rules (first Sunday after the first full moon on or after the March equinox).
Easter MondayMonday after Easter SundayDate varies annually based on Easter Sunday date.
ANZAC DayApril 25thMondayised since 2014. If Apr 25th is a Saturday or Sunday, observed on the following Monday.
King's BirthdayFirst Monday in JuneAlways falls on a Monday. Was Queen's Birthday from 1952-2022.
MatarikiVaries 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 DayFourth Monday in OctoberAlways falls on a Monday.
Christmas DayDecember 25thMondayised. 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 DayDecember 26thMondayised. 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.
Swipe

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.