26 January 2026

To determine this, first establish the day of the week. January 1, 2024 was a Monday. 2024 being a leap year adds 2 days, so January 1, 2025 is a Wednesday. 2025 is not a leap year, adding 1 day, making January 1, 2026 a Thursday. January 26 is 25 days after January 1. 25 days is equivalent to 3 weeks and 4 days, so Thursday plus 4 days is Monday. As Australia Day falls on a Monday in 2026, the public holiday date is not shifted and falls on 26 January 2026.