Date Add/Subtract Calculator
Add or subtract years, months, weeks, and days from a date.
About this tool
What is Date Add/Subtract Calculator?
Add or subtract calendar time from a starting date. Enter any combination of years, months, weeks, and days to calculate the resulting date. Month and year adjustments preserve the original day where possible and use the final valid day when the target month is shorter.
How to use
Get your result in a few steps
- 1
Choose the starting date.
- 2
Select whether to add or subtract time.
- 3
Enter any combination of years, months, weeks, and days.
- 4
Click 'Calculate' to see the resulting date.
Frequently asked questions
Questions about Date Add/Subtract Calculator
What happens when adding a month to a date near the end of the month?
If the target month has fewer days, the calculator uses the last valid day of that target month.
Can I add years and days at the same time?
Yes. You can combine years, months, weeks, and days in one calculation.
Can I subtract dates with this tool?
This tool subtracts a specified amount of calendar time from one starting date. For the duration between two dates and times, use the Time Duration Calculator.
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