People say they hate Mondays, but research suggests Tuesdays, Wednesdays and Thursdays are equally loathed.
Researchers in the United States who looked at a poll of 340,000 people have found moods were no worse on Mondays than other working days, bar Friday.
Their report says people were happier as they approached the weekend, lending support for the concept of "that Friday feeling".
The authors told the Journal of Positive Psychology the concept of miserable Mondays should be ditched.
One of them, Arthur Stone of the department of psychiatry at Stony Brook University, says Mondays may just seem bad by comparison.