Is Leah Happier on Fridays Than She Is on Mondays?

Researchers have collected millions and millions of data points to understand under what circumstances do people thrive? And we see a lot of things you would expect. People are typically happier on Fridays and Saturdays than they are on Mondays and Tuesdays. So I think that's the key to good happiness research: We follow large groups of people over time and ask the same questions again and again.