Monday-to-Friday work week

In English factories during the 1850s, managers began granting workers a half-day off on Saturdays, not because they believed in leisure, but because of a tradition called Saint Monday. Workers routinely drank on Sundays and failed to show up the following day. The Saturday half-day was a negotiated exchange for reliable Monday attendance. The six-day week itself was an artifact of the Industrial Revolution, which had reorganized agricultural rhythms around factory schedules requiring continuous operation.

In the United States, the shift toward a two-day weekend began in the early 1900s. A New England cotton mill became one of the first American factories to adopt a five-day schedule, partly to accommodate Jewish workers who observed the Saturday Sabbath. Sunday had long been a rest day enforced by Christian Sabbatarian movements. Combining the two into a standard weekend required decades of labor organizing and cultural negotiation.

Ford Motor Company adopted the five-day, forty-hour work week in 1926. Edsel Ford stated that every worker needed more than one day a week for rest and recreation. The elder Ford framed it differently, arguing that leisure for workmen was neither lost time nor a class privilege. The calculation behind the announcement was economic as much as humanitarian. Ford wanted workers with enough time and money to become consumers. Manufacturers across the country followed.

The federal standard arrived in 1938, when the Fair Labor Standards Act capped the American work week at forty-four hours, with mandatory overtime pay beyond that threshold. The cap dropped to forty hours within two years. The Monday-to-Friday pattern that hundreds of millions of workers now treat as the natural rhythm of life had taken its permanent shape by 1940.