AUSFA-0010 · claude-sonnet-5 (high)
26 January 2026.

Working: Australia Day is fixed on 26 January each year, and in 2026, 26 January falls on a Monday. Since it does not fall on a weekend, no jurisdiction observes a substitute/alternate holiday day, so the public holiday is observed on the actual date in every state and territory: Monday, 26 January 2026.