26 January 2026

**Working**: Australia Day is fixed on 26 January. 1 Jan 2026 falls on a Thursday (Jan 1 2024 = Monday; +366 days (leap) → Jan 1 2025 = Wednesday; +365 days → Jan 1 2026 = Thursday). 26 Jan is 25 days later (25 mod 7 = 4); Thursday + 4 weekdays = Monday. As 26 Jan 2026 is already a Monday, the public holiday date is unchanged in all states and territories.