Some people bounce out of bed at 6 a.m. sharp and run out of steam by nine at night. Others are foggy all morning and hit their stride after dark. That difference is not laziness or discipline — it is your chronotype, the internal timing of your body clock, and it is largely genetic. The shorthand is lark (morning type) versus owl (evening type), and knowing which one you are is one of the most useful things you can learn about your sleep.
Take the free chronotype quiz here — it takes about two minutes and tells you where you fall on the lark-to-owl spectrum, then what to do with the answer. The rest of this page explains what your result means.
What the lark-or-owl questionnaire measures
The original "lark or owl questionnaire" is a validated research tool — the Morningness-Eveningness Questionnaire (MEQ), developed by Horne and Östberg in 1976. It asks about the times you would naturally prefer to wake, sleep, exercise, and do demanding mental work if you were completely free to choose. Your answers place you on a spectrum from definite morning type to definite evening type, with most people landing somewhere in between.
The key insight behind it: your best wake time is not a matter of willpower, it is a matter of biology. The questionnaire surfaces the schedule your body actually wants.
The three broad types
- Larks (morning types). Wake early and easily, peak in the morning, wind down early. Roughly a quarter of people lean strongly this way. Larks thrive on conventional 9-to-5 schedules and struggle with late nights.
- Owls (evening types). Slow to start, peak in the late afternoon or evening, prefer to sleep and wake late. Owls are not broken — they are running on a genuinely later internal clock, which is why forcing a lark's schedule on an owl feels like permanent jet lag. (The genetics behind night owls is here.)
- In-betweens. The largest group. Mild preferences either way, adaptable to most schedules.
Why your chronotype matters
Working with your chronotype instead of against it improves how you sleep and how you perform:
- Sleep timing. Owls forced to sleep early lie awake; larks forced to stay up lose quality sleep. Matching your bedtime to your chronotype is the single biggest lever for falling asleep easily.
- Peak performance. Schedule demanding work for your peak window — morning for larks, afternoon/evening for owls — and it gets easier.
- Light strategy. Owls trying to shift earlier need bright morning light and dim evenings; larks who want to stay up later do the opposite. (How morning light sets your clock is here.)
Can you change your chronotype?
Only at the edges. Your baseline is largely genetic and does not fundamentally change, but you can nudge your clock earlier or later by an hour or two using consistent light exposure, meal timing, and sleep schedule. An owl will rarely become a true lark — but an extreme owl can become a manageable one. The goal is not to fight your type; it is to align your life to it as much as your obligations allow, and gently shift the rest.
Take the questionnaire
Start with your result: the free chronotype quiz is here. Once you know whether you lean lark or owl, everything else — your ideal bedtime, your best work hours, your light strategy — follows from it. And if you want a broader read on your overall sleep, the free Titan Sleep Score quiz is a separate two-minute assessment of where your sleep stands.