Business Days Calculator

Work out working days and deadlines without opening a calendar or a spreadsheet.

What it does:

• Counts the working days between two dates for a country (and, where it matters, a state or region), and lists the public holidays and weekend days inside the range.
• Adds or subtracts N working days from a date and tells you which public holidays were skipped on the way.
• Checks whether a single date is a working day, a weekend day or a public holiday.
• Finds the next (or previous) business day.
• Calculates deadlines: N calendar or business days from a start date, and what happens when the result lands on a weekend or holiday. For Poland it explains the rule it applied (Civil Code art. 111 and 115, Code of Administrative Procedure art. 57).
• Lists the public holidays of a year for a country or region, in English or another available language.

Good to know:

• Everything is computed offline from the open-source Python "holidays" library (about 250 countries and territories; many have state or region codes such as US-CA or DE-BY). Your questions are not sent to any third-party service and nothing is stored.
• Weekends follow the country (for example Friday and Saturday in Israel or Saudi Arabia).
• By default the start day is not counted and a deadline that falls on a weekend or holiday moves to the next business day; both can be changed.
• Supported dates: 1990-2060. Holiday data can miss local or company-specific days off, and legal deadline rules differ by country, contract and document type. Informational only, not legal advice - confirm important deadlines.

Try: "How many working days between 2026-10-01 and 2026-12-24 in Germany?", "Is 3 November 2026 a public holiday in Japan?", "Termin 14 dni od 2026-10-10 wg KPA", "Ile dni roboczych zostało do końca roku w Polsce?".

MCP server: https://business-days.util9.com/mcp

Try asking ChatGPT:

• How many working days are there between 2026-10-01 and 2026-12-24 in Germany?
• Invoice dated 2026-10-12, payment due in 30 days. What if that falls on a holiday?
• Ile dni roboczych zostało do końca roku w Polsce?