Understanding working days
The week, minus the weekend.
What counts as a "working day" depends on where you live, what you do, and which contract you're reading.
The default — Monday to Friday.
In most of the world, Saturday and Sunday are the rest days and Monday through Friday is the working week. The total between two dates equals the total days minus the Saturdays and Sundays inside the span. The arithmetic is trivial; the subtlety is at the boundaries — whether the start and end days are themselves included.
working = total − weekend days, inclusive of both endpoints
Sunday–Thursday, and other regional weeks.
The Mon-Fri convention is not universal. Across the Gulf — Saudi Arabia, Kuwait, Egypt and most of the Arab world — the standard working week was historically Sunday to Thursday, with Friday and Saturday as the rest days. The UAE shifted to Monday-Friday with a half-day Friday in 2022, but Saudi Arabia and others still use the older pattern. Iran and Afghanistan run Saturday to Wednesday. Israel runs Sunday to Thursday. The week chip-strip above lets you mark any combination of days as the weekend.
Six-day weeks.
Many small businesses, hospitality, retail, and most of South Asia run on a six-day working week — Monday through Saturday, with only Sunday off. Some industries take a half-day on Saturday, which the tool can't model directly; the closest honest approximation is to count every Saturday as a full working day and adjust afterwards.
Holidays are out of scope.
The calculator does not subtract public holidays. There's no universal calendar — they vary by country, by region within a country, by religion, by year, and frequently by short-notice government announcement. Most legal contracts that mention "business days" carry a definition or a holiday list right there in the contract. If you need a holiday-aware count, subtract your local non-working days from the figure above.
"Business day" in finance and law.
Settlement of stock trades in the US runs on T+1 business days as of 2024 — a sale on Monday settles on Tuesday, ignoring federal holidays. Bank wire transfers, court filings, and "delivery within 5 business days" all use a similar convention but with their own holiday calendars. When a contract mentions business days, look for aholidays definition section nearby; the answer is usually there.
Counting from a Friday afternoon.
A common misconception: "5 business days from Friday at 3 pm" does not put you 5 calendar days later. The next four working days are Monday, Tuesday, Wednesday, Thursday — so "5 business days" lands on the following Friday, exactly seven calendar days out. This calculator counts whole days inclusive of the start; do not double-count the day you're starting from.