Why Working-Day Rules Differ So Much Between Countries
There is no world standard for a working day. A contract that says delivery in 20 working days can mean 26 calendar days in one country and 31 in another.
Reason one: the weekend itself moves
Most of Europe and the Americas rest on Saturday and Sunday. Egypt, Saudi Arabia and Israel rest on Friday and Saturday. A team split between Berlin and Cairo shares only Monday to Thursday as full working days, four days out of seven, before any holiday enters the picture.
Reason two: holiday counts run from 8 to 27
England and Wales have 8 bank holidays in a typical year. India publishes lists above 20 once regional days are counted, and some Spanish regions reach similar totals. The raw count matters less than placement: a holiday on a Tuesday costs one day, while the same holiday moved to a Monday builds a three-day break that empties an office.
Reason three: observance rules quietly shift days
- United States: a federal holiday on Saturday is observed on Friday, on Sunday it moves to Monday.
- Japan: a holiday on Sunday pushes the rest day to Monday, and a weekday sandwiched between two holidays becomes a holiday itself.
- United Kingdom: substitute days move weekend holidays to the next Monday or Tuesday.
- France: no automatic shift, but bridging the gap day is a workplace custom with real staffing effects.
What to write into a schedule
Name the country whose calendar governs the deadline. Then count from that country's own table, not from a generic business-day setting in a spreadsheet, because the spreadsheet default is almost always the United States.