Add/Subtract Days - Date Ninja

Add or subtract days from any date

Start date

Days Positive to add, negative to subtract

Business days only (Mon–Fri)

Frequently Asked Questions

How do I subtract days from a date?

Enter a negative number in the Days field. For example, enter -10 to find the date 10 days before your start date.

What are business days?

Business days are weekdays from Monday to Friday. When the Business Days toggle is enabled, weekends (Saturday and Sunday) are skipped in the calculation.

Does this calculator account for holidays?

No, the calculator only skips weekends when counting business days. It does not account for public holidays, which vary by country and region.

Can I share my calculation with someone?

Yes! Click "Copy link" to copy a URL with your settings encoded. Anyone opening that link will see your exact calculation.

Does this handle leap years correctly?

Yes, the calculator correctly handles leap years and varying month lengths using JavaScript's built-in Date object.