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Date Calculator

Add or subtract days, weeks, months, and years from any date. Calculate the difference between two dates. Find business days and Australian public holidays.

Add / Subtract from a Date
Start Date
Operation
Years
Months
Weeks
Days
Result
Result Date
UnitValue
Date Difference Calculator
Start Date
End Date

Date Calculations in Australia

When calculating deadlines, contract periods, or legal notice periods in Australia, it's important to know whether "days" means calendar days or business days. The Interpretation Act 1901 (Cth) provides rules for how time periods are counted in Commonwealth legislation.

Business Days

Business days in Australia exclude weekends (Saturday and Sunday) and public holidays. Public holidays vary by state and territory. Always check your specific state's public holiday calendar for accurate business day counts.