**26 January 2026**

Working:
- Australia Day is observed on a fixed calendar date: 26 January each year.
- In 2026, 26 January falls on a Monday (a weekday).
- Because the date already lands on a weekday, no substitute (Monday-in-lieu) public holiday is required; the public holiday is observed on the actual date.
- Therefore the Australia Day public holiday in 2026 falls on **26 January 2026**.