Most Common Birthdays
Compare the dates with the largest recorded U.S. birth counts from 2000–2014. The statistics use recorded U.S. births from 2000–2014; birthday symbols and traditions are presented separately.
Dates That Often Rank as More Common
September 12 has the largest total in the U.S. 2000–2014 dataset. Several other September dates appear near the top, alongside dates in other months. The counts show the pattern; they do not establish why a particular birthday is more common.
Most Common Birthdays in the U.S. Data
Rank #1 has the most recorded births; #366 has the fewest. Counts cover 2000–2014 and include leap-day births.
| Rank of 366 | Birthday | Total births | Share of births |
|---|---|---|---|
| #1 | September 12 | 191,024 | 0.307% |
| #2 | September 19 | 190,435 | 0.306% |
| #3 | September 20 | 188,123 | 0.303% |
| #4 | December 19 | 186,685 | 0.300% |
| #5 | September 10 | 186,668 | 0.300% |
| #6 | December 20 | 186,593 | 0.300% |
| #7 | September 18 | 186,387 | 0.300% |
| #8 | August 8 | 186,328 | 0.300% |
| #9 | September 26 | 186,322 | 0.300% |
| #10 | September 17 | 185,792 | 0.299% |
| #11 | August 15 | 185,391 | 0.298% |
| #12 | August 29 | 185,073 | 0.298% |
| #13 | September 9 | 184,662 | 0.297% |
| #14 | August 22 | 183,835 | 0.296% |
| #15 | July 11 | 183,410 | 0.295% |
| #16 | August 1 | 183,254 | 0.295% |
| #17 | July 7 | 183,246 | 0.295% |
| #18 | August 28 | 183,202 | 0.295% |
| #19 | September 13 | 183,131 | 0.294% |
| #20 | September 25 | 183,073 | 0.294% |
February 29 occurred four times in this period; other calendar dates occurred fifteen times. This ranking compares totals, so leap day comes last. It is not a ranking of births per occurrence.
Source: U.S. births, 2000–2014, from the Social Security Administration dataset published by FiveThirtyEight. BirthdayStatistics.com aggregates the recorded counts by month and day. Data licensed CC BY 4.0. Method and limitations.
Why Common Does Not Mean Ordinary
A common birthday can still feel personal. It may mean more people share the date, but the combination of birth year, weekday, moon phase, family story, location, and life events makes each birthday distinct.
Use the Birthday Rank Calculator to compare any date with the rest of the calendar.