birthday traffic

How common is a October 13 birthday?

Published by Birthday Traffic · · Sources and method

October 13

Uncommon

Rarer than 86.6%of other birthday dates.

1 in 378births in this sample share your birthday.

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  • 10,800births in an average year21 years observed
  • 97%of a typical day11,175 births on an average day
  • #5 of 12October as a month11,204 births per day
  • −4.9%share of births, then to nowfirst five vs last five observed years

October 13 is the 317th most common birthday of the 366 dates in this collection, and the 50th rarest. It records 226,792 births out of 85,712,738, so roughly 1 in 378 people in this sample were born on it.

It is more common than 13.4% of the other 365 dates and rarer than 86.6%, which puts it in the top 25% rarest birthdays. It records 96.6% of an average day’s count in the sample.

October 13 among all 366 dates

All 366 dates sorted from most to least common by recorded U.S. births 1994–2014, coloured by rarity tier, with October 13 marked.

October 13 among all 366 datesAll 366 dates sorted from most to least common by recorded U.S. births 1994–2014, coloured by rarity tier, with October 13 marked.0100,000200,000300,000Very common: 91 dates, ranks #1–#91Very commonCommon: 92 dates, ranks #92–#183CommonUncommon: 147 dates, ranks #184–#330UncommonRare: 18 dates, ranks #331–#348Very rare: 15 dates, ranks #349–#363Super rare: 3 dates, ranks #364–#366#317 October 13: 226,792October 13 · #317 of 366most commonleast common
Very common 91Common 92Uncommon 147Rare 18Very rare 15Super rare 3All 366 dates from most to least common, coloured by the six rarity tiers; October 13 is marked. Recorded U.S. births, 1994–2014.

October 13 against the days around it

Recorded U.S. births, October window, 1994–2014
DateTotal birthsRank of 366
October 10243,883#79
October 11237,531#130
October 12232,009#217
October 13 (this date)226,792#317
October 14234,977#168
October 15237,459#131
October 16234,508#175

October as a whole records 11,204 births per day, ranked #5 of 12 months. Month ranking · October 12 · October 14

Has October 13 changed over time?

Annual U.S. birth totals changed across this window, so a raw daily count moves with the size of the year. The chart uses each year's share of that year's births instead, in births per 100,000. Averaged over the first five observed years it is 267.9 per 100,000; over the last five, 254.8 per 100,000 (-4.9%).

October 13 as a share of each year’s U.S. births, 1994–2014

Births on October 13 per 100,000 births in that year, one point per year, with the change of source at 2000 marked and the first-five and last-five year means drawn as bands.

October 13 as a share of each year’s U.S. births, 1994–2014Births on October 13 per 100,000 births in that year, one point per year, with the change of source at 2000 marked and the first-five and last-five year means drawn as bands.150200250300350SSA file from 2000first five: 267.9last five: 254.819941996199820002002200420062008201020122014per 100,000, 1994: 288.4 per 100,000per 100,000, 1995: 284.1 per 100,000per 100,000, 1996: 204.8 per 100,000per 100,000, 1997: 262.3 per 100,000per 100,000, 1998: 299.8 per 100,000per 100,000, 1999: 304.1 per 100,000per 100,000, 2000: 282.5 per 100,000per 100,000, 2001: 210.6 per 100,000per 100,000, 2002: 180.9 per 100,000per 100,000, 2003: 275.2 per 100,000per 100,000, 2004: 312.1 per 100,000per 100,000, 2005: 306.8 per 100,000per 100,000, 2006: 291.3 per 100,000per 100,000, 2007: 199.9 per 100,000per 100,000, 2008: 269.5 per 100,000per 100,000, 2009: 308.8 per 100,000per 100,000, 2010: 304.7 per 100,000per 100,000, 2011: 304.5 per 100,000per 100,000, 2012: 203.8 per 100,000per 100,000, 2013: 180.5 per 100,000per 100,000, 2014: 280.3 per 100,000per 100,000
The dotted line marks the change from the CDC/NCHS file to the SSA file.
October 13 as a share of that year's U.S. births
YearBirths on this datePer 100,000 births
199411,398288.4
199511,078284.1
19967,970204.8
199710,180262.3
199811,815299.8
199912,041304.1
200011,723282.5
20018,659210.6
20027,416180.9
200311,455275.2
200413,069312.1
200512,922306.8
200612,628291.3
20078,756199.9
200811,616269.5
200912,941308.8
201012,358304.7
201112,201304.5
20128,153203.8
20137,172180.5
201411,241280.3

Source break: 1994–1999 counts come from the CDC/NCHS daily file and 2000–2014 from the Social Security Administration daily file. The overlapping years 2000–2003 are taken from the SSA file only, so each year is counted once. But the step at 2000 is a change of source as well as a change of year, and any comparison across it includes that change.

The weekday the date fell on, scheduling practice and recording practice are all inside these lines.

A generation earlier, in the separate daily file for 1969–1988, October 13 ranked #118 of 366 with 9,732 births per occurrence. The 1969–1988 calendar and what changed since.

October 13 in five countries

Countries are compared only over the matched years 2007–2014, which all five sources cover completely, and using births per occurrence so that leap day is handled the same way everywhere. Each country's records are counted on their own.

October 13 rank and intensity, 2007–2014
CountryRank of 366Index (100 = average day)
United States#33193.7
England & Wales#28398.1
Denmark#24997.4
Metropolitan France#25098.4
Malaysia#166100.3

In the matched window the U.S. rank is #331; over the full 1994–2014 collection it is #317. The two numbers answer different questions and usually differ for two reasons at once: the window is eight years against twenty-one, and the metric is births per occurrence against the total across the whole period. Every figure on this page names its window and its metric. Full five-country study.

Among the 6,025,603 people living in Denmark on January 1, 2026, 15,776 have this birthday, one resident in 382. A count of people living there, wherever they were born. How many people in Denmark share a birthday.

Born on October 13

12 people from the English Wikipedia “On this day” birth lists, oldest first. A reading list. Every birth figure on this page comes from the national records.

Names and descriptions from English Wikipedia, CC BY-SA 4.0, retrieved 2026-09-11; curated arts/science/sport entries, years 1800–2008. not a celebrity census. conflicting identities excluded.

Keep going

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Sources, method and limits

Main ranking: 85,712,738 recorded U.S. births on 7,670 calendar dates, 1994–2014. CDC/NCHS daily counts for 1994–1999 and Social Security Administration daily counts for 2000–2014, as compiled by FiveThirtyEight and attributed under CC BY 4.0. The overlapping years 2000–2003 are counted once.

Ranks compare totals across the 366 observed month-and-day dates. February 29 occurred 5 times in this window; every other date occurred 21 times, so per-occurrence figures are used wherever seasonality is compared.

Every figure above comes from the administrative records named here, at the granularity those records publish: a day, a month or a year. Coverage and definitions differ between countries and eras, so two sources are combined only where their documentation states the windows are separate, and the page where that happens says so.

Full method, leap-day treatment and definitions.

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