New research shows that a certain number of women find Wednesdays the most stressful day of the week. And it gets worse. The study says these women look their oldest at 3:30 every Wednesday afternoon.

That is the time when energy levels plummet, work stress is at a peak, and the effects of weekend late nights finally kick in.

The study reports that a quarter of the women also feel stress several times a week, but Wednesdays are the worst. One in five admit they work through their lunch hour on Wednesdays.

The study reports that Thursday is the day women are most likely to have sex. And with sex comes a glow and a happier, more upbeat feeling, which makes Friday the best-feeling day of the week.