Date and time
Business Day Calculator (Excl. Weekends/Holidays)
Calculate an estimated date "N business days" in the future or past from a specific start date, excluding weekends and Japanese public holidays.
Result Date
Works well with
To count calendar days including weekends and holidays, try the days between dates calculator.
Features of Business Day Calculator
Quickly calculate dates "N business days" in the future or past from a specific start date. Perfect for planning deadlines and schedules.
Open details
You can customize the calculation by checking or unchecking the "Exclude Weekends" and "Exclude Japanese Public Holidays" options. By default, both are checked to reflect a standard Japanese business calendar.
The start date is treated as day 0, so choose 1 business day later to get the next working day after it.
Difference from the days calculator
When you need the plain calendar difference between two dates, including weekends and holidays, the days calculator is the better fit. Use this business day calculator when weekends and Japanese public holidays have to be skipped.
Company holidays, temporary closures, and year-end breaks are not applied automatically. For official deadlines, also check your own calendar and your counterparty's working days.
Frequently asked questions
How are public holidays determined?
The tool uses Japanese public holiday data from the bundled holiday library, including substitute holidays. For official deadlines, also check your company or counterparty calendar.
Is the start date counted as a business day?
The start date is treated as day 0. For example, 1 business day after a Monday is normally Tuesday when weekends and holidays are excluded.
Can I count Saturdays and Sundays as business days?
Yes. Turn off the weekend exclusion option when you need to count Saturdays and Sundays as working days.
Are my entered dates saved?
No. The calculation runs in your browser and the entered dates and options are not sent to a server.