birthday traffic

How common are November birthdays?

Published by Birthday Traffic · · Sources and method

November is the 10th most common birth month of the 12, at 10,927 recorded births per day, 2.2% below an average day across 85,712,738 U.S. births from 1994–2014. Its most common date is November 21 (#76 of 366) and its quietest date that occurs every year is November 27 (#359).

Every date is coloured by the same six rarity tiers the reveal uses; the small number is its rank of 366 from most common.

Every November date: recorded U.S. births 1994–2014

One column per November date in calendar order, coloured by rarity tier, total recorded births 1994–2014.

Every November date: recorded U.S. births 1994–2014One column per November date in calendar order, coloured by rarity tier, total recorded births 1994–2014.050,000100,000150,000200,000250,0001: 239,41912: 233,6903: 234,5434: 234,6205: 236,01456: 233,8527: 238,5228: 235,7929: 230,266910: 232,57411: 234,81412: 233,58113: 226,7401314: 237,24715: 236,83716: 232,32817: 234,5921718: 235,56019: 237,26320: 241,57121: 244,132244,1322122: 224,88523: 208,30124: 211,11725: 210,0212526: 211,93527: 205,164205,16428: 212,95129: 226,9882930: 228,854
Calendar order; each column is the date’s total across the window, in its rarity colour.

Every November date, ranked

Ranked by total recorded births across the 21 years, the same measure as the site-wide rank of 366.

Recorded U.S. births per November date, 1994–2014
DateTotal birthsRank of 366Odds
November 21244,132#761 in 351
November 20241,571#1001 in 355
November 1239,419#1101 in 358
November 7238,522#1191 in 359
November 19237,263#1321 in 361
November 14237,247#1341 in 361
November 15236,837#1401 in 362
November 5236,014#1471 in 363
November 8235,792#1541 in 364
November 18235,560#1561 in 364
November 11234,814#1701 in 365
November 4234,620#1721 in 365
November 17234,592#1731 in 365
November 3234,543#1741 in 365
November 6233,852#1841 in 367
November 2233,690#1861 in 367
November 12233,581#1871 in 367
November 10232,574#2041 in 369
November 16232,328#2081 in 369
November 9230,266#2531 in 372
November 30228,854#2891 in 375
November 29226,988#3131 in 378
November 13226,740#3181 in 378
November 22224,885#3361 in 381
November 28212,951#3531 in 402
November 26211,935#3541 in 404
November 24211,117#3551 in 406
November 25210,021#3571 in 408
November 23208,301#3581 in 411
November 27205,164#3591 in 418

November in the year

November has 8.03% of all recorded births in this sample, over 630 observed days. Months are ranked by births per day. On that measure November is #10 of 12, against September at the top (11,811 per day) and January at the bottom (10,721). Full month ranking.

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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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