Why it is impossible to work eight hours a day, five days a week There are 365 days in a year. In a leap year 366. Let us be generous and begin with 366. Days in the year 366 days Eight hours of sleep each day equals a total of 122 days 366-122 = 244 days Eight hours of rest/leisure time a day equals a total of 122 days 244-122 = 122 days You don't work Saturday and Sunday, so subtract 104 days 122-104 = 18 days You have an hour for lunch each working day which equals 10 days 18-10 = 8 days Of these eight working days, you must surely have at least one week's holiday a year. Which leaves you with a single day to work on. Christmas day. And nobody works on Christmas day.