Count elapsed dates
- Input or situation
- 1 September 2026 to 2 September 2026
- Result
- 1 day between the dates
Counting both dates inclusively gives two dates. Check the inclusive option against the convention used by your booking or deadline.
Time
Business Days Calculator & Date Diff
Count calendar or business days between dates, or find a deadline from a start date. Set the weekends, holidays and whether the first day counts.
Runs in your browser — your input is not uploaded to ToolsNow.
Pick a start and end date to count the days between them.
Working calendar — weekend pattern & holidays
Which days are non-working each week.
Preset public holidays to exclude.
Any YYYY-MM-DD dates found in this box are also excluded.
How the counting works. The start date is never counted — counting begins on the following day. When counting between two dates, the end date counts if it is a working day. When adding business days, weekends and selected holidays are skipped and the result is always a working day, so ten business days from a Monday is the Monday two weeks later. A zero-day offset returns the start date, moved to the next working day if it falls on one.
Contracts, courts, employers, and government agencies may use different deadline-counting rules. Confirm the applicable rule when calculating an official or legal deadline. Holiday presets cover national public holidays only for the years shown and exclude regional observances — check your local calendar.
How to use
- Choose a mode. Between two dates counts the gap; Add / subtract finds a deadline.
- Enter your dates. Total days, business days and the number of skipped days appear immediately.
- Open the working calendar to change the weekend pattern or switch on a holiday preset.
- Add custom holidays as YYYY-MM-DD dates for company closures or regional days off.
Questions
Is the start day counted?
No. The start day is excluded and the end day is counted if it is a working day. That matches how notice periods and delivery windows are usually quoted — "10 business days from Monday" lands on the Monday two weeks later.
Can I use a non Sat–Sun weekend?
Yes. Open the working calendar section and choose Fri–Sat or Thu–Fri, which are the standard weekends across much of the Middle East.
Which holidays are included?
Optional 2025–2027 presets for US federal, UK (England & Wales) and Netherlands national holidays, covering national public holidays only and using the observed weekday where a holiday falls on a weekend. You can paste any additional YYYY-MM-DD dates into the custom box — regional, religious and company holidays are not included.
How do I subtract business days?
Switch to Add / subtract and enter a negative number. The tool walks backwards, skipping weekends and holidays the same way.
Examples and checks
Decide whether you need elapsed calendar days or working days. A date difference and an inclusive count of dates answer different questions, especially for bookings and deadlines.
Before you use the result
- Business days depend on the chosen weekend pattern and holiday set. A national preset cannot cover every regional holiday or employer closure.
- Date-only arithmetic does not measure elapsed hours across time-zone or daylight-saving changes. Use the time tools when clock times matter.
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Guides for this task
Guide
Business days vs calendar days: how to count a deadline Count calendar and business days with examples. Check weekends, holidays and whether the start and end dates count before relying on a deadline.
Guide
ISO week numbers: week 1, week 53 and year boundaries Learn how ISO week numbers work, why some dates belong to a different week-year and how Sunday-start conventions can give different results.
Guide
Adding months to a date: what happens at month end? See how date calculators handle 31 January plus one month. Compare clamping with overflow and learn why adding a month differs from adding 30 days.
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