A recent study published in an American Psychological Association journal, Emotion, suggests that early birds are generally happier than night owls.

More than 700 respondents, ranging from ages 17 to 79, were surveyed and asked about their emotional state, health, and preferred time of day.

Self-professed “morning people” reported feeling happier and healthier than night owls. Researchers hypothesize that one of the reasons could be because society caters to a morning person’s schedule.