Both endpoints are included
Between Dates includes both the start and end date before excluding weekends and selected holidays.
050 · DATE & TIME
Business Days Calculator
Calculate working days between dates or find a date before or after a number of business days, excluding weekends and selected holidays.
LOCALCALCULATE IN YOUR BROWSER
LOCALSelected dates and custom holidays are calculated only in this browser and are not sent to or stored on a server.
Built-in holiday data: 2025–2027. Outside this range, only weekends and custom holidays may be reflected.
Custom holidays · Up to 200
RESULT
Check the dates and inputs.
HOW TO USE
How to use
- 01
Choose Between Dates or Add Business Days.
- 02
Select Korea, United States, or Japan.
- 03
Enter dates and the business-day count, then review the holiday rule.
- 04
Calculate the business-day count or target date.
- 05
Copy the summary or expand excluded holidays when needed.
BUSINESS DAY GUIDE
The rules that create one-day differences in business-day calculations
Use the same inclusion window, weekend rule, holiday dataset, and region when comparing results.Saturday and Sunday are excluded
Monday through Friday are business-day candidates; Saturday and Sunday are always excluded.
Regional holidays are excluded separately
With holiday exclusion enabled, the selected Korea, U.S., or Japan dataset plus custom holidays is applied.
IMPORTANT NOTES
Important notes
- The default workweek is Monday through Friday, with Saturday and Sunday excluded.
- When holiday exclusion is enabled, built-in regional holidays and custom holidays are also excluded.
- Check the displayed holiday-data coverage for years outside the built-in dataset.
- If a company, contract, or agency defines business days differently, follow that definition.
- Results are scheduling references, not legal or contractual advice.
FAQ
Frequently asked questions
01What is a business day?+
This tool treats Monday through Friday as business days, excluding weekends and selected holidays.
02Are both start and end dates included?+
Yes. Between Dates uses an inclusive start-and-end calculation window.
03Can I ignore public holidays?+
Yes. Turn holiday exclusion off to exclude weekends only.
04What does zero business days return?+
It returns the base date itself.
05Are my dates stored?+
No. Dates and custom holidays are processed locally in the browser.