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How common is my birthday?

How common is a August 25 birthday?

August 25 is the 79th most common birthday in the US out of 366, 4% more common than the average date.

How common is my birthday?

August 25

๐Ÿ‘ฏ Very common

#79 / 366

The 79th most common US birthday ยท 4% more common than the average date

More common than 79% of other dates ยท US births 1994โ€“2014

namelette.com/birthdays/august-25

Fun facts about August 25

  • August is the 2nd busiest birth month in the data (count back about 9 months: hello, holiday season).
  • About 11,615 US babies were born on August 25 in a typical year (average over 21 years).

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Every birthday, ranked 1โ€“366Most commonLeast common
Heatmap of how common each birthday is in the US. Darker red is more common, purple is less common.
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Where these numbers come from

Real US birth counts for every day from 1994โ€“2014 (21 years, 85,712,738 births), published by FiveThirtyEight: US_births_1994-2003_CDC_NCHS.csv (CDC National Center for Health Statistics) and US_births_2000-2014_SSA.csv (Social Security Administration). The files overlap in 2000โ€“2003; we use CDC/NCHS for 1994โ€“1999 and SSA for 2000โ€“2014 so each year counts once.

Method: for each year we divide each day's births by that year's daily average (so bigger and smaller years count equally), then average that ratio for each calendar date across the years it exists. February 29 is averaged over the 5 leap years only (1996, 2000, 2004, 2008, 2012), so it isn't penalized for existing once every four years. Dates are ranked 1โ€“366. Averaging over many years also evens out the weekday effect (fewer births on weekends). This is for fun, not a forecast.