Date calculators · Workdays & planning
Add Business Days
Add or subtract working days from a date using your workweek, a country holiday calendar and your own closures.
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Select your counting rules and calculate.
Calculation details
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How to use this calculator
Choose a starting date, add or subtract, and a whole number of working days. Adjust the working weekdays and excluded dates. Leave the start uncounted for days after or before that date, or include it if your counting convention requires it.
A selected starting date counts only when it is a working day and is not excluded. A zero-day shift always returns the starting date unchanged, even on a weekend. The result includes a calendar-day distance and a breakdown of skipped dates. Dates are counted as whole days, without business hours or cutoff times.
A worked example
From Friday November 6, 2026, adding one working day with a Monday–Friday workweek and an uncounted start gives Monday November 9. Excluding November 9 moves the result to Tuesday November 10.
US Thanksgiving 2026 example: add five business days
Start on Monday, November 23, exclude the start date and weekends, and add five working days:
- Close on Thanksgiving only: count November 24, 25, 27, 30 and December 1. The result is Tuesday, December 1.
- Also close on Friday, November 27: the result moves to Wednesday, December 2.
Use your workplace's actual closures. Optional printable: Thanksgiving business-day comparison (one-page PDF, opens in a new tab).
Holiday-date reference: US Office of Personnel Management.
Can this estimate a delivery or project date?
Yes, when you supply the applicable workweek and closures. Carrier cutoff times, processing policies and jurisdiction-specific deadline rules are not inferred. Use the result as calendar planning under the rules you entered.
Choose a country and region to load holidays automatically, then review the selected dates and uncheck holidays you work. Add your own closures separately. The country holiday lists explain regional coverage; public holidays do not guarantee time off for every employer.
Which calendar and years are supported?
These tools use Gregorian calendar dates for years 1–9999, without historical calendar-switch dates. They count dates, not elapsed hours. Today buttons use the current date in your browser's time zone.
What happens to my dates?
Calculations run on your device. Saving a calculation is optional and keeps it in this browser. A setup link contains the dates and settings you entered; anyone with the link can read them. Use one tab per saved calculator. Clear saved data from Privacy & settings.
Loading automatic holidays sends only the country, region and calendar years to TimeCubby. Your exact dates, times and workplace closures are not sent.