How Popular Is Your Birthday?

Two decades of American birthdays, averaged by month and day.

← Less common | More common →

Notes: The conception date, purely for illustration, is 266 days prior to birth. It represents a hypothetical “moment of conception” based on the normal gestation period for humans, 280 days, minus the average time for ovulation, two weeks.

Data: U.S. National Center for Health Statistics (1994-2003); U.S. Social Security Administration (2004-2014) — via FiveThirthyEight

Credit: Matt Stiles/The Daily Viz