Birth Month
Your birth month compared to global distribution, peak birth seasons by country, and famous people who share it.
Post-holiday conceptions dip slightly
January-borns are
-4%
less common than the monthly average
Birth frequency by month (relative to average)
The Relative Age Effect
January-borns are among the most over-represented in elite sports due to the relative age effect.
Notable January-borns
Put It In Context
The relative age effect is one of the most replicated findings in sports science: in any age-grouped program with a fixed cutoff date, children born just after the cutoff are nearly 12 months older than the youngest in their cohort — bigger, stronger, more coordinated. They get selected for elite programs, receive better coaching, and the gap compounds. NHL rosters show ~40% of players born in Q1 vs. ~15% in Q4. The gap fades in adulthood but shapes entire careers.
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