Calendar desk
Add Business Days
Move by weekdays while excluding Saturday and Sunday.
Add Business Days: Find the date a given number of working days after your starting date, skipping Saturdays and Sundays. A negative offset moves backwards through weekdays. The starting date does not consume a day of the offset, and weekday public holidays still count because this tool has no holiday calendar. Runs 100% locally in your browser with zero server file uploads.
- Category
- Calculators
- Runs
- In your browser
- Cost
- Free · no sign-up
- Availability
- Ready to use
Result date
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- Business-day offset
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Result date = start date moved by offset weekdays; Saturday and Sunday are skipped- Dates are calendar dates at UTC midnight; no local timezone or daylight-saving adjustment is applied.
- Results are planning utilities. Public holidays, locale-specific work rules, and company policies are not inferred.
- Only Saturday and Sunday are excluded; public holidays are not removed. The offset is bounded to ±10,000 weekdays.
Offset rule and worked delivery example
Let S be the starting date and N the signed business-day offset. Begin at S, move one calendar day at a time in the direction of N, and reduce the remaining count only on Monday, Tuesday, Wednesday, Thursday or Friday. The result is the date where |N| eligible days have been reached. This is a date offset, not an inclusive count of a range.
Starting on 2025-01-03 with N = 3, skip Saturday 4 and Sunday 5 January. Monday 6 January is day 1, Tuesday 7 January is day 2 and Wednesday 8 January is day 3. The result date is 2025-01-08, with a business-day offset of 3. Five calendar days have passed even though only three weekdays were consumed.
Choosing the right deadline convention
Use this result for a schedule that defines a working week as Monday to Friday. A six-day operation, a regional Friday–Saturday weekend or a holiday-aware contract needs different eligibility rules. This calculator offers none of those adjustments. For a count that includes the first and last weekday, use the business days calculator instead.
The output uses the year-month-day order described by ISO (https://www.iso.org/iso-8601-date-and-time-format.html). Keeping that order when sharing a delivery date avoids ambiguity between day-first and month-first notation.
How to use it
- Choose the date from which the offset begins.
- Enter a whole business-day offset; use a negative number to go backwards.
- Calculate and check the resulting date against any holiday closures that affect your schedule.
Privacy & limitations
Dates, times and results stay in your browser. No inputs are uploaded.
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Frequently asked questions
Does Friday count as day one when I start on Friday?
No. With a Friday start and an offset of one, Monday is the result. Counting begins on the next date in the chosen direction, rather than including the starting Friday.
Will a bank holiday delay the resulting date?
No. Every Monday to Friday counts, including bank holidays. There is no country selector or holiday exclusion field, so adjust for closures separately if your deadline requires that convention.
What happens if I start on a weekend or enter zero?
A non-zero offset steps away from the weekend until enough weekdays have been counted. Zero keeps the original date, even when that date is a Saturday or Sunday; it does not automatically move to Monday.
Free tool · runs in your browser · no account required