DeadlineDays
Calculators
No login · Browser-side calculation

Business Days Calculator - Count Workdays Between Dates

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.

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.

How counting works

Review how start dates, end dates, weekends, public holidays, and company holidays are applied before relying on a result.

Business Days Calculation Rules

Business Days Calculator: Count Workdays by Country

Count business days between two dates by country, excluding weekends, public holidays, and custom company holidays.

Non-working days

Select the days your business or company does not work.

Count the start date if it is a business day.

Count the end date if it is a business day.

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.

Quick dates

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.Review holiday data sources

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.

Real business examples

Use these scenarios to see how the calculator supports an actual business decision, not just a date lookup.

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.

Examples

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.

Why DeadlineDays is different

The calculator pages are designed for business review, not keyword-only date content.

Country-specific public holiday data gives each calculation a concrete calendar context.
Custom non-working weekdays and company holidays support workplace-specific schedules.
Regional holiday coverage is used where reliable data is available.
Browser-side calculation, no login, and clear assumptions help users review results before copying or sharing them.
The examples stay grounded in invoices, SLA commitments, shipping promises, payroll cutoffs, and public holidays.

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.

Common use cases

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.

Related calculators

Add Business Days Calculator: 10, 30, 90 Workdays From TodayFind a date after 10, 30, or any number of workdays, or subtract business days from a deadline.Working Days in a Month CalculatorCalculate how many working days, work days, business days, and work hours are in a month or year by country.Public Holidays by Country and RegionView public holidays by country, region, and year, with source notes for national, regional, bank, school, optional, and observed holidays.

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.