Add Business Days to a Date

Monday through Friday. Saturdays and Sundays are always skipped, and any holidays you list are skipped as well. There is no distinction between full and half days.

Yes. Enter a negative number, such as -10, and the calculator steps backward through working days, still skipping weekends and holidays. The weekday label updates to match the earlier date.

Type or paste each holiday as a YYYY-MM-DD date on its own line in the holidays box. A holiday that already falls on a Saturday or Sunday changes nothing, because weekends are skipped anyway.

No. Counting begins the day after the start date when adding and the day before when subtracting. Adding zero business days therefore returns the start date unchanged.

No. Every date is handled as a plain calendar date in UTC, so clock shifts, daylight saving, and your local time zone never move the result by a day.

The input rounds toward zero, so 2.9 is treated as 2. The engine only accepts whole business days, since fractional working days are not well defined here.

Each holiday line is validated. An entry that is not a real YYYY-MM-DD date, such as 2026-13-40, produces an error message instead of a result, so a typo cannot silently skew the count.

No. It has no built-in holiday calendar, because holidays vary by country, region, and company. You supply the exact dates you observe, which keeps the result correct for your situation.

Yes. All the date math runs locally in your browser and nothing is sent to a server, so your dates and holiday list never leave your device.