Does Sunshine Actually Make People Smile?

When it’s sunny, it seems like people are happier – we fill the parks and beaches, and radio stations start blasting out upbeat tunes. And yet, research has repeatedly failed to find any evidence that people who live in sunnier places enjoy more positive moods.

A new, massive study published this year even brought into question the idea that a lack of sunshine can lead to seasonal affective disorder (SAD). Nearly 35,000 US adults completed a mood survey at different times of year and there was no evidence of more depression symptoms among those who completed the survey in winter.