4 Days, 40 Hours

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4 Days, 40 Hours is a 1971 book by Riva Poor reporting on a "revolution in work and leisure" from a rearranged work week with four days of 10 hours each. In some cases, the book claims, companies can increase production and profit while giving employees more time off.[1][2] For example, Kyanize Paints would make three batches of paint on each of 5 work days, leaving the factory closed on weekends. Employees agreed to work 2 extra hours Monday through Thursday, in exchange for Friday off. The factory was then able to make 4 batches of paint on each of 4 work days. This increased production from 15 to 16 batches.[citation needed]

David Hamilton wrote, "Her research indicates that the shorter week is most successful in small, nondiversified industries."[3]


  1. ^ "The 4-Day Work Week Is Coming ...", Illinois Parks and Recreation, 9 July/August, 1971.
  2. ^ Poor, Riva (1973-01-01). 4 days, 40 hours and other forms of the rearranged workweek. New American Library. 
  3. ^ Alicia Patterson Foundation website