By the 1950s, however, there were calls from labour unions to introduce a four-day week. “People began projecting, if we take out another workday, it’d be even better,” says Harter. But take-up of the four-day workweek has remained slow: by March 2020, a Gallup study of more than 10,000 US full-time employees showed only 5% worked a shorter week.  L