Add or subtract dates
Shift a Gregorian date by days, weeks, months or years with an explicit month-end rule.
Tool guide
How to use Add or subtract dates
Shift a Gregorian date by days, weeks, months or years with an explicit month-end rule.
- Enter the values and choose the operation or units. Read the supported limits beside the inputs; try the labelled sample to see an example.
- No holiday or working-day calendar. Month/year shifts use your selected month-end rule.
- Choose Calculate date. Review the result, then download the text result. Editing inputs invalidates old results.
- Calculations are local and unmetered. Inputs and results are not uploaded or saved to your account; leaving the page clears them. Downloaded files remain on your device.
Common questions
What are the limits of Add or subtract dates?
Gregorian dates 0001–9999; whole offsets up to ±3,652,058 with a valid in-range result. No holiday or working-day calendar. Month/year shifts use your selected month-end rule.