Soviet work-week calendar
About the Soviet work-week calendar
From 1929 the Soviet Union replaced the seven-day week in workplaces with a continuous five-day week, the nepreryvka, with workers assigned staggered rest days by colour or number. A six-day week with common rest days followed in 1931. The traditional seven-day week was restored on 27 June 1940, and throughout the period the underlying Gregorian dates were unchanged.
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