"According to the Trades Union Congress, a federation of labor unions, more than 5.2 million U.K. employees worked 1,968 million unpaid overtime hours last year. If all these employees did all their overtime work at the beginning of the year, they would essentially work for free until February 24. And so the TUC has selected that date for its 10th annual Work Your Proper Hours Day. Employees are encouraged to observe the day by showing up to work on time (not before!), taking a full lunch break, and leaving on time."