The UK had a three day week for a few months in the 1970s in response to coal shortages and an economic crisis: https://www.theblackoutreport.co.uk/2021/01/06/

The UK had a three day week for a few months in the 1970s in response to coal shortages and an economic crisis: https://www.theblackoutreport.co.uk/2021/01/06/three-day-week-1974/ https://www.theblackoutreport.co.uk/2021/01/06/three-day-wee...