Add / Subtract Dates
Add or subtract years, months, weeks and days from any date.
Inputs
Result
Enter your values to see the result.
How it works
Pick a start date, choose Add or Subtract and enter any mix of years, months, weeks and days. Months are applied first, and if the day doesn’t exist in the target month it moves to that month’s last day.
- years/months first (day clamped to month end)
- then weeks and days
- 31 Jan + 1 month = 28/29 Feb
Every calculation runs in your browser. Nothing you enter is uploaded.