How common are October birthdays?
- 11,204births per day#5 of 12 months
- 8.5%of all births in the sample7,293,822 recorded
- October 1most common October date#47 of 366
- October 31quietest date that occurs every year#356 of 366
October is the 5th most common birth month of the 12, at 11,204 recorded births per day, 0.3% above an average day across 85,712,738 U.S. births from 1994–2014. Its most common date is October 1 (#47 of 366) and its quietest date that occurs every year is October 31 (#356).
Every date is coloured by the same six rarity tiers the reveal uses; the small number is its rank of 366 from most common.
- 1#47
- 2#72
- 3#53
- 4#94
- 5#129
- 6#115
- 7#118
- 8#120
- 9#168
- 10#79
- 11#130
- 12#217
- 13#317
- 14#168
- 15#131
- 16#175
- 17#122
- 18#164
- 19#294
- 20#193
- 21#199
- 22#159
- 23#198
- 24#127
- 25#152
- 26#250
- 27#206
- 28#183
- 29#211
- 30#299
- 31#356
Every October date: recorded U.S. births 1994–2014
One column per October date in calendar order, coloured by rarity tier, total recorded births 1994–2014.
Every October date, ranked
Ranked by total recorded births across the 21 years, the same measure as the site-wide rank of 366.
| Date | Total births | Rank of 366 | Odds | |
|---|---|---|---|---|
| October 1 | 247,196 | #47 | 1 in 347 | |
| October 3 | 246,263 | #53 | 1 in 348 | |
| October 2 | 244,271 | #72 | 1 in 351 | |
| October 10 | 243,883 | #79 | 1 in 351 | |
| October 4 | 242,165 | #94 | 1 in 354 | |
| October 6 | 238,783 | #115 | 1 in 359 | |
| October 7 | 238,644 | #118 | 1 in 359 | |
| October 8 | 238,416 | #120 | 1 in 360 | |
| October 17 | 238,374 | #122 | 1 in 360 | |
| October 24 | 237,881 | #127 | 1 in 360 | |
| October 5 | 237,559 | #129 | 1 in 361 | |
| October 11 | 237,531 | #130 | 1 in 361 | |
| October 15 | 237,459 | #131 | 1 in 361 | |
| October 25 | 235,823 | #152 | 1 in 363 | |
| October 22 | 235,268 | #159 | 1 in 364 | |
| October 18 | 235,107 | #164 | 1 in 365 | |
| October 9 | 234,977 | #168 | 1 in 365 | |
| October 14 | 234,977 | #168 | 1 in 365 | |
| October 16 | 234,508 | #175 | 1 in 366 | |
| October 28 | 233,982 | #183 | 1 in 366 | |
| October 20 | 233,282 | #193 | 1 in 367 | |
| October 23 | 233,099 | #198 | 1 in 368 | |
| October 21 | 233,044 | #199 | 1 in 368 | |
| October 27 | 232,423 | #206 | 1 in 369 | |
| October 29 | 232,185 | #211 | 1 in 369 | |
| October 12 | 232,009 | #217 | 1 in 369 | |
| October 26 | 230,333 | #250 | 1 in 372 | |
| October 19 | 228,654 | #294 | 1 in 375 | |
| October 30 | 228,305 | #299 | 1 in 375 | |
| October 13 | 226,792 | #317 | 1 in 378 | |
| October 31 | 210,629 | #356 | 1 in 407 |
October in the year
October has 8.51% of all recorded births in this sample, over 651 observed days. Months are ranked by births per day. On that measure October is #5 of 12, against September at the top (11,811 per day) and January at the bottom (10,721). Full month ranking.
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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