site.btaMarch 13, 1973: Five-Day Workweek Decreed in Bulgaria
A workshop in Sofia's Voroshilov Plant for communication equipment, Sofia, August 27, 1952 (BTA Archive/Lyudmil Kostov)
On March 13, 1973, Bulgaria started transitioning from a six-day to a five-day workweek, which was phased in by 1974.
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