Business days between dates
Count Monday-to-Friday weekdays between two dates for a simple business-day estimate. This is a calculator convention, not a universal workweek or holiday calendar; adjust for the schedule and location that apply to you.
Result
Business days
How to use this tool
- Enter the start date.
- Enter the end date.
- Read the number of business days between them.
Assumptions
- Counts Monday–Friday as business days — does not exclude public holidays, since these vary by country and region.
Sources & reference data
Technical details: what the fields mean
- Start date
startDate - The earlier date.
- End date
endDate - The later date.
Methodology
Counts each weekday (Monday–Friday) in the range from the start date up to (but not including) the end date.
Worked example
Thu 1 Jan 2026 to Sun 11 Jan 2026
Inputs: Start date: 2026-01-01, End date: 2026-01-11
Result: 7 business days
Over Christmas in England & Wales: Mon 21 Dec 2026 to Mon 4 Jan 2027
Inputs: Start date: 2026-12-21, End date: 2027-01-04
Result: 10 weekdays. GOV.UK lists three bank holidays in that range — Christmas Day (Fri 25 Dec), Boxing Day substitute (Mon 28 Dec) and New Year's Day (Fri 1 Jan) — so subtract 3 for 7 working days.
Counting a full Monday-to-Friday week including the Friday
Inputs: Start date: 2026-01-05 (Mon), End date: 2026-01-10 (Sat)
Result: 5 business days. Entering Friday 9 Jan as the end date gives 4, because the end date itself isn't counted — set the end date one day later to include it.
Practical guidance
- Subtract any known public holidays from the result manually, since these aren't included in this calculation.
- UK bank holidays differ between England & Wales, Scotland and Northern Ireland; GOV.UK publishes each list, including substitute days when a holiday falls at a weekend.
Common mistakes
- Forgetting to subtract public holidays for a region-specific working-day count — this calculator only excludes weekends.
FAQs
Which dates are counted between the start and end date?
Weekdays from the start date up to, but not including, the end date are counted. Saturday and Sunday are treated as weekends; public holidays are not removed. Weekend and holiday rules vary by location and workplace, so adjust the result for your own calendar if needed.
How do I include both the start and end date?
Set the end date one day later than the last day you want counted. For example, Monday 5 to Saturday 10 January 2026 returns 5, covering Monday to Friday inclusive.
Last reviewed: 2026-10-11
Excludes weekends only — public holidays vary by country/region and aren't accounted for.
This tool provides an indicative estimate, based on the assumptions stated above.
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