Count working days excluding weekends and public holidays. Supports Japan and the US, with holidays computed automatically so they are always current.
Select country
Use a positive number to count forward, a negative number to count backward.
Result date
2026-07-03
Fri
Weekends skipped
2
Holidays skipped
0
Business calendar
2026-06
Business days this month
22
Weekend
8
Holiday
0
Custom holiday
0
Sun
Mon
Tue
Wed
Thu
Fri
Sat
31
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
1
2
3
4
Business dayWeekendHolidayCustom holiday
Holidays are calculated automatically — always up to date
This tool derives holidays from the year by calculation, so no manual updates are ever needed and results stay accurate even if the site is left untouched. Unlike other sites whose holiday data goes stale and produces wrong answers, it keeps handling moved Monday holidays, the equinoxes, and substitute holidays correctly.
Sources: Cabinet Office of Japan, National Holidays
What is the Business Days Calculator?
The Business Days Calculator works with the days you actually work — it skips Saturdays, Sundays, and public holidays. It offers two modes. The first finds the date that falls N business days after (or before) a start date, which is handy for deadlines, payment due dates, and delivery estimates. The second counts the number of business days between two dates, useful for estimating effort or working days. It supports public holidays in Japan and the United States, correctly handling moved Monday holidays, the vernal and autumnal equinoxes, substitute holidays, and national holidays.
How to use it
1. Choose a country (Japan or the United States).
2. Pick a mode. "Add / subtract business days" gives the date N business days from a start date; "Business days between dates" counts the business days between two dates.
3. In add mode, enter the start date and the number of business days. A negative number counts backward into the past.
4. In range mode, enter the start and end dates, and toggle "Include end date" if needed.
5. The result shows the date or the count of business days, along with the weekends and holidays that were excluded.
How it works
A business day is any calendar day that is neither Saturday nor Sunday and is not a public holiday. Add mode steps forward (or backward for negatives) one day at a time from the day after the start date, skipping weekends and holidays until it reaches the requested number of business days. Range mode examines each day from the start to the end date and totals the days that are weekdays and not holidays. Holidays are derived from the year by calculation, including fixed-date holidays, nth-Monday holidays, astronomically computed equinoxes, and substitute and national holidays caused by adjacent observances.
Frequently asked questions
What is a business day? ▾
A business day is a regular working day — any weekday from Monday to Friday that is not a public holiday. Weekends and public holidays are not business days.
How are public holidays handled? ▾
The holidays of the selected country are excluded from the count automatically. Japan uses the national holidays defined by the Cabinet Office, and the US uses the federal holidays. When a holiday falls on a weekend, the observed day is handled appropriately.
Are substitute and national holidays taken into account? ▾
Yes. For Japan, substitute holidays (when a holiday falls on a Sunday) and national holidays (a weekday sandwiched between two holidays) are included automatically. For the US, a holiday on a Saturday is observed on the preceding Friday, and one on a Sunday on the following Monday.
Is the year-end and New Year period (Dec 29 – Jan 3) a holiday? ▾
No. The only statutory national holiday in this period in Japan is January 1 (New Year's Day). Many companies close from December 29 to January 3, but those are not legal public holidays, so the tool counts only New Year's Day. Add any company-specific closures separately.
Why do Japan and the US give different results? ▾
Because each country has different holidays. Over the same period, a different number or set of holidays changes the business-day count and the resulting date. Be sure to select the country you want to calculate for.
This tool provides a general estimate based on national and federal public holidays. It does not include company, bank, or regional closures, or special one-off holidays. Verify important dates against official sources. Supported years are 1980–2099.