One week
Input
2026-07-06 | 2026-07-12
Output
Business days: 5
Date Duration & Business Days Calculator
Count the days between two dates or find a business-day deadline, with weekends and Japanese national holidays handled for you.
Conversion tools
Loading tool
What it helps with
- Count business days for a delivery or reply deadline
- Check how many working days remain until a date
- See which Japanese holidays fall inside a period
How to use
- Choose duration mode for two dates, or deadline mode for a start date plus business days.
- Pick dates with the calendar or type them as YYYY-MM-DD.
- Review calendar days, business days, and the Japanese holidays inside the range.
Examples
Range with a holiday
Input
2026-07-13 | 2026-07-26
Output
Business days: 9 (Marine Day skipped)
Deadline after 5 business days
Input
2026-07-16 + 5 business days
Output
2026-07-24
Good to know
- Holidays follow the current national holiday rules from 2020 onward, including the 2020/2021 Tokyo Olympics moves; older years are not covered.
- Company-specific closures such as year-end breaks or Obon are not included.
- Supported years are 2020-2099.
FAQ
- Which holidays are excluded from business days?
- Japanese national holidays under the current rules, including substitute holidays and citizens' holidays, for the years 2020-2099.
- Is the start date counted?
- Duration mode shows both inclusive and exclusive day counts. Deadline mode starts counting from the next day, which matches common Japanese business usage.
- Are dates uploaded?
- No. All calculations run in your browser.