Date Add or Subtract
Add or subtract days, weeks, months, or years from a date.
Result
Saturday, May 9, 2026
0 days after the start.
Negative values count backwards. Months and years clamp the day if the target month is shorter (Jan 31 + 1 month = Feb 28 or 29).
About
Pick a starting date, add or subtract any combination of days, weeks, months, and years. Returns the resulting date. Handles month rollover correctly (adding 1 month to Jan 31 gives Feb 28, not Mar 3).
How to use
- Pick the starting date.
- Enter days, weeks, months, or years to add (use negative to subtract).
- See the resulting date and day of the week.
FAQ
What happens if the result is invalid (Feb 30)?+
It clamps to the last valid day of the month. Adding 1 month to Jan 31 gives Feb 28 (or 29 in leap years), not Mar 3.
Are weekends counted?+
Yes. This counts calendar days. Use the Business Days Between tool for working days only.