Did you know that the 40 hour work week is totally made up. From Groovy Green – The 4 Day Work Week:
The notion of our standard work week here in America has remained largely the same since 1938. That was the year the Fair Labor Standards Act was passed, standardizing the eight hour work day and the 40 hour work week.
So when you consider alternate work schedules and hours, keep in mind that there’s no real reason you are supposed to work 5 days a week, 8 hours a day.