Twitter analysis reveals the late-day energy low is nearly universal.
Sociologists at Cornell University analyzed a half billion Twitter updates from around the world for positive and negative feelings.
They found that regardless of country and culture, Twitter users' moods followed similar patterns of highs and lows during the day.
The 2.4 million Twitter users analyzed even had late-day slumps on weekends.
It's not just you: That late-day slump is nearly universal, at least in the world of social network users.
Sociologists at Cornell University studied updates from millions of Twitter users, analyzing tweets on an hourly and daily basis. After breakfast, moods from Dubuque to Dubai start going downhill.
"We found a very similar pattern in India, Africa, Europe, the UK, Canada, North America, Australia, New Zealand. The patterns are very, very similar even though all those cultures are different," said Michael Macy, a sociology professor at Cornell who, along with sociology graduate student Scott Golder, co-authored an article about the study in the latest issue of Science.