Add or subtract business days
Find the date 10, 30 or 90 business days from today or any date.
How to find a date a number of business days away
Enter a start date and a number of business days and the calculator steps through the calendar, skipping weekends and U.S. federal holidays, to find the date you land on. It is the tool for "30 business days from today" questions: filing windows, delivery estimates and payment terms.
Step by step
- Enter the Start date. It starts on today's date.
- Choose Add or Subtract and enter the number of Business days.
- Choose whether to Exclude weekends and U.S. federal holidays, or weekends only.
- Press Calculate new date. The result shows the date, how many days were skipped and why, and a calendar of the period.
Worked examples
- Over Thanksgiving: 10 business days after Friday, November 20, 2026 is Monday, December 7, 2026. Three weekends and Thanksgiving are skipped. With weekends only it is Friday, December 4.
- Counting back: 10 business days before Monday, December 7, 2026 is Friday, November 20, 2026.
Common uses
- Response and filing windows. "Respond within 10 business days" or "the agency has 30 business days to decide": start from the date the clock starts and add the days.
- Delivery dates. Add the quoted number of business days to the ship date to see when a parcel should land, with holidays taken into account.
- Payment runs. If invoices are paid 5 business days after approval, add 5 to the approval date.
- Counting back. Choose Subtract to find the latest date you can act: 3 business days before a closing, for example.
Reading the result
The result shows the start date, how many business days were added or subtracted and what was excluded, then the date you land on with its day of the week. The side panel lists how many Saturdays, Sundays and holidays were passed over, and the calendars mark them in pink so you can see exactly why a 10 business day count stretched over three weekends and a holiday.
Rules this tool follows
- The start date is day zero. One business day after a Friday is the following Monday.
- Observed holidays are skipped on the same rules as the business days counter: a Saturday holiday also closes the Friday before, a Sunday holiday the Monday after.
- Up to 99,999 business days in one go, within years 2011 to 9999 when holidays are excluded.
Questions people ask
Does the start date count as the first business day?
No. Counting starts the day after. If a filing is due "within 10 business days of" a Friday, the tool gives the Friday two weeks later, assuming no holiday.
Can I add months or years in business days?
No, business days are counted one by one. For months and years use Add or subtract days.
Can I use my own company holiday calendar?
Not yet. Choose Weekends only and add your closures by hand, or tell us on the feedback page which calendar you need.
What if the start date itself is a weekend or holiday?
That is fine. The start date is never counted, so starting on a Saturday and adding 1 business day gives the Monday, the same as starting on the Friday.
Why is my result later than I expected?
Check the side panel: it lists every weekend day and holiday that was skipped. Thanksgiving week and the days around Christmas and New Year often add two or three calendar days to a short count.
Is my date sent anywhere?
No. All date math runs in your browser.