A worker pours a pint of beer at London's Pressure Drop Brewery, one of 61 U. Justin Tallis/AFP via Getty ImagesIs it finally time for the four-day workweek?Results from a new pilot program at dozens of employers in the United Kingdom showed major benefits to workers' health and productivity when their hours were reduced — and a vast majority of firms plan to stick with the condensed schedule. "I think the real question is: Why five days? I haven't heard anybody give me a reason why we work five days other than tradition," he said