Add or subtract days, weeks, months, or years from any date to find the resulting date instantly.
This tool adds or subtracts a chosen number of days, weeks, months, or years from any starting date to find the resulting date.
The calculation adjusts the date using standard calendar arithmetic, correctly handling different month lengths and leap years.
Select a start date, choose add or subtract, enter the amount, and select the unit (days, weeks, months, or years), then click Calculate.
Example: Adding 45 days to a given date shows the exact resulting calendar date along with the day of the week.
Does this account for leap years. Yes, the calculation uses standard JavaScript date arithmetic which correctly handles leap years.
Can I calculate a date far in the past. Yes, subtracting a large number of days, weeks, months or years works the same way.