Public holidays in Australia, including any substitute days when Anzac Day (25 April) falls on a Saturday, are governed by the laws of each state and territory rather than by uniform national rules. Consequently there is no single extra Monday holiday that applies to all employees across the country.

Whether an employee receives the substitute Monday off (or receives penalty rates or a day in lieu) turns on:
- the jurisdiction in which they perform their work, and
- the specific public-holiday provisions in the applicable state or territory statute, modern award, enterprise agreement or employment contract.

Some jurisdictions provide a substitute day; others do not, or provide it only for certain classes of employees (e.g., those who would ordinarily work on the Saturday). A payroll officer must therefore check the legislation and instruments that apply to each worksite or employee cohort rather than assume a nationwide entitlement.