Answer 6 questions to discover your natural sleep-wake preference — your chronotype. This shapes your peak energy hours, best bedtime, and productivity windows.
1. If you had no obligations, what time would you naturally wake up?
2. How do you feel during the first 30 minutes after waking up?
3. You have an important exam at 7 AM tomorrow. When would you study?
4. When do you feel your best — peak energy and focus?
5. If you could freely choose your bedtime, what time would you go to sleep?
6. A friend asks you to join a 2-hour activity starting at 7 AM on a free day. How would you feel?
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Ideal bedtime
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Natural wake time
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Peak focus hours
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Best exercise time
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Chronotypes — FAQ
What is a chronotype?
Your chronotype is your genetically determined preference for sleeping and waking at specific times. It's driven by your circadian rhythm — the internal 24-hour clock regulated by light exposure, body temperature, and hormone release (primarily melatonin and cortisol). About 25% of people are morning types, 25% are evening types, and 50% fall somewhere in the middle.
Can I change my chronotype?
Partially. Chronotype is largely genetic, but you can shift it by 1–2 hours with consistent light exposure, meal timing, and sleep schedule. Morning light exposure is the most powerful tool for shifting earlier. Screens at night push your clock later. Significant shifts (3+ hours) are very difficult to maintain long-term.
Does chronotype change with age?
Yes. Children tend to be early types (morning larks). During puberty, chronotype shifts dramatically toward eveningness — this is biological, not laziness. Evening preference peaks around age 20, then gradually shifts back toward mornings throughout adulthood. By age 60+, most people have returned to morning preference.