Turn a working-day interval into a date
The starting date is day zero
Choose a start date, an integer number of business days and a direction. The tool moves one calendar date at a time, excluding the starting date. It counts Monday to Friday and skips country-wide public and bank holidays from the selected source calendar.
Moving forward and backward
Add days to estimate a finish date, or subtract them to work back from a known date. Both directions use the same holiday rules. The result lists skipped holidays so you can check why the date moved farther than expected; every year crossed by the interval is loaded as needed.
A numerical deadline is not a legal rule
This calculator does not determine whether a contract uses calendar days or business days, when a notice takes effect, or which court calendar applies. Set the counting basis from the relevant agreement or official process before relying on the date.
When to use the main counter instead
The deadline form uses a Monday–Friday, country-wide calendar. For Saturday work, regional holidays or company closures, use the main business-days calculator to check the proposed start and finish dates with those options.
One business day after a Friday
| Start and holiday setting | Result |
|---|---|
| July 17, 2026 + 1 business day; no holidays | Monday July 20, 2026 |
| July 2, 2026 + 1 business day; United States | Monday July 6, 2026; July 3 is skipped |
| July 20, 2026 − 1 business day; no holidays | Friday July 17, 2026 |
Frequently asked questions
Why is Friday plus one business day Monday?
The starting Friday is day zero. Saturday and Sunday are skipped, making Monday the first counted day.
Does Net 30 always mean 30 business days?
No. Select the unit stated in your payment terms; the invoice calculator offers calendar-day and business-day modes.
Are local closures included?
Only country-wide holiday records are used here. Check local calendars and use the main counter’s additional days when necessary.
See the rules and formulas in our calculation methodology. Found a discrepancy? Send an example for review.
Explanation reviewed October 17, 2026. Example results depend on the stated assumptions.