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
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.
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.