Western Australia Business Day Calculator
Last reviewed: August 26, 2026 · Holiday data: August 26, 2026
Calculate business days in Western Australia with its own public holidays. Western Australia shares the Monday to Friday working week and the Saturday and Sunday weekend with the rest of Australia, but its public holiday calendar is different, so due dates and deadlines can land differently from the national count.
How Western Australia differs from the national Australian holidays
Western Australia keeps the national framework but shifts and adds key days. It takes Labour Day on the first Monday of March, gazettes an extra public holiday for Anzac Day on the following Monday when 25 April falls on a weekend, observes Western Australia Day on the first Monday of June, and holds the King's Birthday on a separate date in late September rather than the national June date, so the June holiday is dropped. Western Australia is the only jurisdiction whose Anzac rule names Saturday as well as Sunday, and it adds the Monday rather than moving the day, so 25 April stays a public holiday in both 2026 and 2027. A weekend Christmas Day, Boxing Day, or New Year's Day works the same way. The King's Birthday date really is set by proclamation here, published in the Government Gazette at least three weeks ahead. Western Australia does not observe Easter Saturday, and Easter Sunday always falls on a Sunday, so neither changes the count. The working week is Monday to Friday with a Saturday and Sunday weekend.
Worked example
Adding 2 business days to Friday, May 29, 2026 using Western Australia's public holidays lands on Wednesday, June 3, 2026. With the national Australian public holidays, the same calculation lands on Tuesday, June 2, 2026: the gap comes from Western Australia's own calendar.
Western Australia public holidays in 2026
| Date | Day | Public holiday |
|---|---|---|
| January 1 | Thursday | New Year's Day |
| January 26 | Monday | Australia Day |
| March 2 | Monday | Labour Day |
| April 3 | Friday | Good Friday |
| April 6 | Monday | Easter Monday |
| April 25 | Saturday (weekend) | ANZAC Day |
| April 27 | Monday | Anzac Day (additional) |
| June 1 | Monday | Western Australia Day |
| September 28 | Monday | King's Birthday |
| December 25 | Friday | Christmas Day |
| December 26 | Saturday (weekend) | Boxing Day |
| December 28 | Monday | Boxing Day (additional) |
How to count Western Australia business days
For an interactive calculation, use the Australia calculator and add Western Australia's own dates under Advanced options. The per-year public holiday page below lists every Western Australia date ready to paste in.
Western Australia public holiday data is verified against the Government of Western Australia (wa.gov.au).
Related links
Sources and verification
Official source: wa.gov.au (opens in a new tab)
Cross-checked against this source on August 26, 2026.
For informational purposes only
This calculator provides general estimates based on business day counting rules. It does not constitute legal advice. Deadlines in legal, regulatory, or contractual matters may be subject to jurisdiction-specific rules, court orders, or statutory exceptions. Always verify critical deadlines with a qualified professional.