There is nothing magical about 40 hours. It just happens to be the number of hours that most companies (in the west) happens to choose for historical reasons:

There is nothing magical about 40 hours. It just happens to be the number of hours that most companies (in the west) happens to choose for historical reasons: https://www.okta.com/au/identity-101/40-hour-work-week/ https://www.okta.com/au/identity-101/40-hour-work-week/