What this is about? This questionnaire is based on the Morningness–Eveningness Questionnaire (MEQ), first developed in the 1970s by researchers Horne and Östberg. It has been used for decades in sleep science to identify whether someone naturally leans toward being an early bird, a night owl, or somewhere in between. The MEQ has been validated in thousands of studies and is still widely used today to explore sleep timing, performance peaks, and circadian health.

Why chronotypes exist. Different chronotypes are thought to be an evolutionary feature. Anthropologists call this the sentinel hypothesis: in early human groups, it was safer if not everyone slept at once. A mix of early risers and late sleepers meant someone was more likely to be awake to keep watch. Today, that same diversity shows up in the natural variation of when we feel alert, hungry, or ready to sleep.

What this means for you. Your chronotype influences more than bedtime. It shapes the hours you feel sharpest at work, the best times to train, and when your body most wants to wind down. This quiz helps you spot where you sit on that spectrum so you can better align your daily rhythm with your biology.