Add or subtract days
Add or subtract a number of calendar days from a date, including month and year boundaries.
What the result means
Adding calendar days walks the civil calendar, including weekends. It is not a business-day offset.
How it is calculated
Result = start ± n calendar days
- n: Whole days.
The date is stored as year-month-day and advanced in UTC days so local DST cannot skip a calendar date.
Assumptions
- Gregorian calendar. No timezone conversion beyond the date you typed.
Worked example
23 days from 19 August 2026
The command-bar example.
- Result
- 11 September 2026
That is calendar addition, including the weekends in between.
Need working days instead?
Use the business days calculator, which skips weekends and public holidays in a chosen state.
Questions
Does this skip holidays?
No. Use business days or the public holiday list.
Related calculators
- Date differenceCount the days, weeks, weekdays and weekends between two dates, plus an age-style years/months/days span.
- Business daysCount Australian business days between two dates, or add and subtract working days, with national and state public holidays.
- CountdownCount whole days until a date, or how many days ago a date was.
Sources
ISO
Last reviewed 2026-08-19
Dates & time · Last reviewed 2026-08-19
Estimates only. Not tax, legal or financial advice. Check official sources before relying on a figure.
Printed from OzCalc (ozcalc.com). Last reviewed 2026-08-19. Estimates only — not tax, legal or financial advice.