Question: when did the 5 day work week begin
[{'answer': '1908', 'provenance': [{'wikipedia_id': '2016347', 'title': 'Workweek and weekend', 'start_paragraph_id': 11, 'start_character': 3, 'end_paragraph_id': 11, 'end_character': 7, 'bleu_score': 1.0, 'section': 'Section::::History.\n'}]}, {'answer': '1940', 'provenance': [{'wikipedia_id': '2016347', 'title': 'Workweek and weekend', 'start_paragraph_id': 11, 'start_character': 491, 'end_paragraph_id': 11, 'end_character': 495, 'bleu_score': 1.0, 'section': 'Section::::History.\n'}]}, {'answer': 'In 1908', 'provenance': [{'wikipedia_id': '2016347', 'title': 'Workweek and weekend', 'start_paragraph_id': 11, 'start_character': 0, 'end_paragraph_id': 11, 'end_character': 7, 'bleu_score': 1.0, 'section': 'Section::::History.\n'}]}, {'provenance': [{'wikipedia_id': '2016347', 'title': 'Workweek and weekend', 'start_paragraph_id': 11, 'start_character': 0, 'end_paragraph_id': 11, 'end_character': 653, 'bleu_score': 0.8913425428591251, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 9278313341254112216}, 'section': 'Section::::History.\n'}]}, {'provenance': [{'wikipedia_id': '2016347', 'title': 'Workweek and weekend', 'section': 'Section::::History.\n', 'start_paragraph_id': 11, 'end_paragraph_id': 11, 'meta': {'evidence_span': ['In 1908, the first five-day workweek in the United States was instituted by a New England cotton mill so that Jewish workers would not have to work on the Sabbath from sundown Friday to sundown Saturday. In 1926, Henry Ford began shutting down his automotive factories for all of Saturday and Sunday. In 1929, the Amalgamated Clothing Workers of America Union was the first union to demand and receive a five-day workweek. The rest of the United States slowly followed, but it was not until 1940, when a provision of the 1938 Fair Labor Standards Act mandating a maximum 40-hour workweek went into effect, that the two-day weekend was adopted nationwide.', 'In 1908, the first five-day workweek in the United States was instituted by a New England cotton mill so that Jewish workers would not have to work on the Sabbath from sundown Friday to sundown Saturday.', '1908']}}]}, {'provenance': [{'wikipedia_id': '2016347', 'title': 'Workweek and weekend', 'section': 'Section::::History.\n', 'start_paragraph_id': 10, 'end_paragraph_id': 10, 'meta': {'evidence_span': ['The present-day concept of the relatively longer \'week-end\' first arose in the industrial north of Britain in the early part of the nineteenth century and was originally a voluntary arrangement between factory owners and workers allowing Saturday afternoon off from 2pm in agreement that staff would be available for work sober and refreshed on Monday morning. The Oxford English Dictionary traces the first use of the term "weekend" to the British magazine "Notes and Queries" in 1879. In 1908, the first five-day workweek in the United States was instituted by a New England cotton mill so that Jewish workers would not have to work on the Sabbath from sundown Friday to sundown Saturday.', 'In 1908, the first five-day workweek in the United States was instituted by a New England cotton mill so that Jewish workers would not have to work on the Sabbath from sundown Friday to sundown Saturday.', '1908']}}]}]