birthday traffic

How common are June birthdays?

Published by Birthday Traffic · · Sources and method

June is the 4th most common birth month of the 12, at 11,306 recorded births per day, 1.2% above an average day across 85,712,738 U.S. births from 1994–2014. Its most common date is June 27 (#71 of 366) and its quietest date that occurs every year is June 8 (#210).

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 June date: recorded U.S. births 1994–2014

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

Every June date: recorded U.S. births 1994–2014One column per June date in calendar order, coloured by rarity tier, total recorded births 1994–2014.050,000100,000150,000200,000250,0001: 235,15712: 239,0843: 237,0914: 236,4955: 235,35056: 237,1857: 235,1758: 232,223232,2239: 233,388910: 236,38811: 235,23212: 236,18013: 232,7561314: 237,83215: 233,32916: 237,18017: 237,1361718: 238,88019: 235,64920: 242,45521: 238,1052122: 234,41323: 236,83624: 238,66525: 240,3242526: 239,95327: 244,291244,29128: 243,53929: 239,1172930: 243,178
Calendar order; each column is the date’s total across the window, in its rarity colour.

Every June 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 June date, 1994–2014
DateTotal birthsRank of 366Odds
June 27244,291#711 in 351
June 28243,539#831 in 352
June 30243,178#881 in 352
June 20242,455#921 in 354
June 25240,324#1051 in 357
June 26239,953#1081 in 357
June 29239,117#1121 in 358
June 2239,084#1131 in 359
June 18238,880#1141 in 359
June 24238,665#1171 in 359
June 21238,105#1241 in 360
June 14237,832#1281 in 360
June 6237,185#1351 in 361
June 16237,180#1361 in 361
June 17237,136#1381 in 361
June 3237,091#1391 in 362
June 23236,836#1411 in 362
June 4236,495#1441 in 362
June 10236,388#1451 in 363
June 12236,180#1461 in 363
June 19235,649#1551 in 364
June 5235,350#1581 in 364
June 11235,232#1611 in 364
June 7235,175#1621 in 364
June 1235,157#1631 in 364
June 22234,413#1791 in 366
June 9233,388#1891 in 367
June 15233,329#1901 in 367
June 13232,756#2021 in 368
June 8232,223#2101 in 369

June in the year

June has 8.31% of all recorded births in this sample, over 630 observed days. Months are ranked by births per day. On that measure June is #4 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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