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Calculate the number of days, weeks, and months between two dates, or add and subtract days from any date to find a future or past date.
Select an end date to see the difference
Common date calculations
| Event | Days away | Date |
|---|---|---|
| End of year | 272 days | 31 Dec 2026 |
| End of financial year (30 Jun) | 88 days | 30 June 2026 |
| Christmas Day | 266 days | 25 Dec 2026 |
| Easter Sunday | 2 days | 5 Apr 2026 |
| 30 days from today | 30 days | 3 May 2026 |
| 60 days from today | 60 days | 2 June 2026 |
| 90 days from today | 90 days | 2 July 2026 |
Click any row to load it into the calculator.
Australian financial dates
The Australian financial year runs from 1 July to 30 June. BAS (Business Activity Statement) quarters end on 30 September, 31 December, 31 March, and 30 June. Individual tax returns are due by 31 October (or later if lodged through a tax agent).
Business days
Business days (or working days) are Monday through Friday, excluding public holidays. Many Australian legal and financial deadlines are measured in business days. This calculator counts weekdays but does not account for public holidays, which vary by state and territory.
Leap year rules
A year is a leap year if it is divisible by 4 — except for century years (divisible by 100), which are only leap years if they are also divisible by 400. So 2000 was a leap year, but 1900 was not. The next leap year is 2028.
How it works
Days between:
end - start = days
(in milliseconds / 86,400,000)
Add days:
start + N days = result
Business days:
Skip Sat (6) & Sun (0)
Date tips
Inclusive vs exclusive counting
"Days between" excludes the start date by default (like counting fence panels between posts). "Including end date" counts both dates (like counting fence posts).
Months vary in length
February has 28 (or 29) days. April, June, September, and November have 30. All others have 31. Our "total months" figure uses the average of 30.44 days.
To find the number of days between two dates, subtract the earlier date from the later date. Each date can be converted to a number (milliseconds since 1 January 1970), and the difference divided by 86,400,000 gives you the number of calendar days. This is useful for tracking project timelines, contract periods, notice periods, and how many days until an important event like the end of the financial year.
Business days exclude weekends (Saturday and Sunday). In Australia, many legal deadlines and settlement periods are specified in business days. For example, a 5 business day settlement period starting on a Wednesday would end on the following Wednesday, skipping the weekend. Note that public holidays also affect business day counts but vary by state and territory, so always check your local holiday calendar for precise deadlines.