How to Calculate Your Exact Age
What "exact age" really means, how to break it into years, months and days, and the common mistakes that trip people up.
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Sleep & Age Guides.
Plain-English guides on calculating your exact age and building a realistic sleep schedule — no jargon, no guesswork.
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Leap Years and Your Birthday
What makes a leap year, why we need them, how February 29 birthdays work, and how leap days change age math.
READ →Your Age in Days, Weeks and Months
Why tracking age in smaller units is useful, how the numbers are computed, and how days, weeks and months compare.
READ →Chronological vs Biological Age
Your calendar age versus your body's age: why they differ, how biological age is measured, and what you can influence.
READ →Sleep Cycles Explained: Why 90 Minutes Matters
What a sleep cycle is, the stages inside it, and why waking at the end of a cycle helps you feel more rested.
READ →Best Bedtime for Your Wake-Up Time
Work backwards from your alarm using 90-minute cycles — and why sleep latency changes the math.
READ →Sleep Latency Explained
What sleep latency is, what's normal (roughly 10–20 minutes), and why it matters when you plan a bedtime.
READ →How Much Sleep Do Adults Need
The 7–9 hour guideline for adults, why needs vary, and the signs that you're actually sleeping enough.
READ →Sleep Needs by Age
How much sleep newborns, toddlers, teens and older adults really need — and why needs change across life.
READ →Jet Lag and Sleep Cycles
Why jet lag happens, how light resets your body clock, and a practical plan for recovering after a long flight.
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