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Business Days Calculator - Count Workdays Between Dates

Written and maintained by DeadlineDaysReviewed on August 1, 2026

This example counts 21 business days from Jun 1 through Jun 30, 2026 for a U.S. Monday-Friday schedule with Juneteenth excluded.

Business Days Calculator: Count Workdays by Country

Count eligible workdays across a date range.

Primary calculator inputs
Count the start date if it is a business day.
Count the end date if it is a business day.

Quick dates

Calendar and holiday rulesCountry: United States · Non-working days: Saturday, Sunday · Exclude public holidays: On · Holiday coverage: National holidays only · Custom holidays: 0
Non-working days

Select the days your business or company does not work.

Load public holidays for the selected country and remove them from working days.

Public holiday rules can vary by state, province, region, bank, school, or organization.

Enter one holiday per line, such as 2026-05-15 Company holiday or 2026-06-01.

Direct answer

Business days between June 1 and June 30, 2026

Example for the United States with a Monday-Friday schedule, excluding federal public holidays. Use the calculator below to change country, include-start/end rules, and company holidays.

Date range
Jun 1-Jun 30
Calendar days
30
Weekends / holidays
8 / 1
Business days
21

Example assumptions: United States, Saturday/Sunday weekend, Juneteenth excluded, start and end dates included.

Calculate business days between two dates by country, excluding weekends, public holidays, and custom holidays. No login required.

No login. No database. Calculator inputs are not stored on a server.

Use this calculator for project deadlines, invoice payment windows, SLA planning, payroll cutoffs, and other date ranges where weekends and holidays matter. The calculation runs in your browser and your inputs are not stored on a server.

How counting works

For a date range, confirm whether the first and last dates count, then review which weekdays, public holidays, and company closures were removed.

Business Days Calculation Rules

Public holiday data

Public holiday data is loaded from the configured holiday API and may differ from official government, bank, school, employer, or carrier calendars. Verify critical deadlines with official sources.Source registry last reviewed: 2026-07-28Review holiday data sources

Holiday data status

Data status: Source review record (US 2026)

Source review status
Verified
Source review date
2026-07-28
Coverage
Observed federal holiday closure dates for Monday-Friday federal employees.
Limitations
State, local, bank, school, employer, and regional observances are excluded.
Source registry last reviewed
2026-07-28
Not an official calendar
Yes. Holiday data is a reference layer loaded from the API and may differ from official government, bank, school, employer, carrier, contract, payroll, or company calendars. Verify binding deadlines with the governing official source, contract, carrier, employer, payroll provider, or policy.

Add regional, employer, company, bank, carrier, or contract closures as custom holidays when they govern this calculation.

Planning reference only. Confirm day 0/day 1, contract start/end inclusion rules, official calendars, company holiday policy, and other governing calendars before relying on this business-day count.

Day 0 and day 1 boundary ledger

Compare including the first date as day 0 with beginning the count after it as day 1, then inspect every included or excluded date.

Fixed example: June 18-22, 2026, with Juneteenth and Saturday/Sunday excluded.

Included and excluded date ledger
DateBoundaryDecisionReason
Jun 18, 2026StartExcludedEndpoint setting
Jun 19, 2026Inside rangeExcludedHoliday
Jun 20, 2026Inside rangeExcludedNon-working weekday
Jun 21, 2026Inside rangeExcludedNon-working weekday
Jun 22, 2026EndIncludedBusiness day

Compare including the first date as day 0 with beginning the count after it as day 1, then inspect every included or excluded date.

Start-boundary comparison
ScenarioStart treatmentReasonBusiness daysFirst counted date
Day 0IncludedBusiness day2Jun 18, 2026
Day 1ExcludedEndpoint setting1Jun 22, 2026

Reverse range

When the later date is entered first, the calculator orders the dates chronologically before applying the start and end inclusion settings.

Business days formula

DeadlineDays starts with the calendar dates in the selected range, applies your include-start and include-end settings, then removes non-working days.

  1. Count calendar dates from the start date to the end date.
  2. Apply whether the start date and end date should be included.
  3. Remove dates that match the selected non-working days.
  4. Remove public holidays for the selected country when enabled.
  5. Remove custom holidays entered by the user.
  6. If a public holiday and custom holiday share the same date, count that date once.

Evidence to review in a range count

A useful range total should explain what qualified as a working date instead of presenting one unexplained number.

  • The count separates eligible weekdays from dates skipped as weekends, public holidays, or company closures.
  • Independent start-date and end-date controls make contract wording such as inclusive or exclusive counting visible.
  • Country and regional choices identify the public-holiday calendar used for the selected range.
  • Custom closures let a project calendar reflect shutdowns that do not appear in a national holiday feed.

Range-counting decisions

These examples show why the same pair of dates can produce a different workday total when the governing calendar or inclusion rule changes.

Project deadline example

Input
Start: May 14, 2026. End: June 30, 2026. Country: US.
Output
The result shows business days, calendar days, weekends, and holidays excluded.

Useful when estimating a delivery window for a project plan or client commitment.

Invoice payment window example

Input
Start: invoice date. End: expected payment date. Exclude holidays.
Output
The calculator shows the working days available for payment processing.

This helps finance teams review practical payment windows without treating weekends as workdays.

HR, payroll, or SLA planning example

Input
Start and end dates around a payroll cutoff or SLA review period.
Output
Weekend and holiday exclusions make the business-day total easier to audit.

Use the result as a planning reference before confirming dates against policies or contracts.

South Korea project deadline with public holidays

Situation
South Korea project deadline with public holidays
Input assumptions
Start date: Monday, June 1, 2026. End date: Monday, June 15, 2026. Country: South Korea.
How DeadlineDays handles it
Count eligible weekdays between the two dates, then review whether a public holiday removes any weekday from the count.
Result interpretation
The legal team sees the practical number of review days available before the deadline is reached.
What the user should verify
The contract may define whether the start and end dates are included, so match the calculator setting to the clause.

Company with Friday/Saturday weekend

Situation
Company with Friday/Saturday weekend
Input assumptions
Vendor packet received on Wednesday and must be approved before the following Friday.
How DeadlineDays handles it
Count only working days in the approval window and exclude weekend days that procurement cannot use.
Result interpretation
Operations can decide whether the vendor can be activated on time or needs a revised launch date.
What the user should verify
Internal blackout dates, security reviews, and missing documents can still extend the onboarding timeline.

This page is best for date ranges where weekends, public holidays, and custom company holidays change the answer.

Project deadlines

Estimate how many workdays remain before a client delivery or internal milestone.

Contract review windows

Count working days while keeping the country and holiday assumptions visible.

Company closure days

Add custom holidays when your organization has closure days beyond public holidays.

Range-count verification checklist

Confirm both boundary-date settings, the selected non-working weekdays, holiday coverage, and any company closure before using the total in a contract or schedule.

FAQ

What is a business day?

A business day is a date that is not excluded by the selected non-working days or holiday settings.

Are public holidays included?

Public holidays are excluded when the public holiday toggle is enabled and holiday data can be loaded for the selected country.

Can I include the start date?

Yes. Turn on Include start date to count the start date when it is a business day.

What happens if a public holiday falls on a weekend?

Weekend days are already excluded, so the same date is not double-counted as both a weekend and a holiday.

Can I add company holidays?

Yes. Add custom holidays one per line using YYYY-MM-DD and an optional name.

Is this legal, payroll, or accounting advice?

No. It is a general date planning tool. Verify critical deadlines with official calendars, policies, contracts, or advisors.

Disclaimer

This calculator is a general date planning tool and is not legal, accounting, payroll, tax, employment, shipping, or contractual advice. Verify important dates with official sources or qualified professionals.