How do I add days to a date?

Enter a starting date, choose Add, and enter the number of days, weeks, months, or years to add — the resulting date appears instantly.

How do I subtract days from a date?

Switch to Subtract and enter the amount to go back — useful for finding a date a certain number of days before an event.

Add or subtract any number of days, weeks, months, or years from a date to find the resulting date.

Start date

Friday, August 14, 2026

Need a different date calculation? See all date calculators.

How do I add days to a date?: Enter a starting date, choose Add, and enter the number of days, weeks, months, or years to add — the resulting date appears instantly.
How do I subtract days from a date?: Switch to Subtract and enter the amount to go back — useful for finding a date a certain number of days before an event.