Add or subtract days from a date

Add or subtract days from a date. Handy for teams and individuals planning schedules, checking deadlines or preparing a document.

Add or subtract days from a date. See a clear result update immediately in your browser, with no account, upload or stored data to worry about.

How to use

Enter the starting date in YYYY-MM-DD format, for example 2026-03-15.
Type the number of days to add, or use a negative number to move backwards.
Run the calculation to get the shifted date.
Check the answer against a calendar when the deadline matters.

Example

To set a deadline thirty days after 15 March 2026, enter that date and the number 30. The result gives the new date you can place in a schedule, contract or reminder.

Input

2026-03-15
30

Output

2026-04-14

Limits and formats

The tool shifts a calendar date; it does not handle times, time zones or working-day rules.
Use the YYYY-MM-DD format to avoid confusion between day and month.
Leap years can affect the result when the shift crosses late February, so verify critical dates.
No working-day calculation is offered, so professional deadlines must be adjusted by hand.

Where processing happens

The date shift is calculated in your browser. The starting date and day count stay on your device and are not uploaded or stored, even across several attempts.

Frequently asked questions

Can I move a date backwards instead of forwards?

Yes, enter a negative number of days. For instance, a value of minus ten moves the starting date ten days earlier, which is useful for checking a previous deadline or calculating a notice period.

Do leap years change the outcome?

They can when the shift crosses 29 February, because that date exists only in leap years. The calculation follows the calendar, but for legal or contractual deadlines it is wise to confirm with an official calendar.

Which date format should I use?

Use YYYY-MM-DD, with the year first, followed by the month and day. This format prevents confusion between dates such as 03/04 and 04/03 when people follow different national conventions.