Scientists have found that when you ask people to record their emotions at regular intervals, it turns out that Mondays are no more stressful or depressing than Tuesday, Wednesday, or Thursday. Fridays only come out ahead because people are anticipating the weekend. Other than that, all work days are equally terrible. But if you ask people to remember which day was worst, they will always say Monday. This comes down to the fact that there is a larger emotional shift from Sunday (a happy weekend day) to Monday (a work day) than there is between two work days. So no matter what, Monday will always seem like it was the worst day of your week.