Your baby’s birthday is undoubtedly a special day…but just how special is it? After all, certain months and dates boast more births than others. So, is your little one destined for a lifetime of shared school celebrations…or will they be blowing out the birthday candles on one of the rarest birthdays of the year? Keep reading to find out the most and least popular birthdays! 

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What are the most common birthdays?

September 9th takes the (birthday) cake as the most common birthday of the year. Some celebs who blow out their candles on this day include Adam Sandler, Michelle Williams, and Hugh Grant. 

It’s one of nine birthdates that make up the top 10! And if you take a peek roughly nine months in the past, it’s easy to see why. Babies born in mid-September were likely conceived right around the holidays when perhaps expecting parents were feeling more festive than usual! (Read more September baby facts!)

The only non-September birthday in the top 10 is July 7th—possibly because that’s when folks who were holding out until after July 4th end up scheduling inductions or c-sections.

Most Common Birthdays

  1. September 9
  2. September 19
  3. September 12
  4. September 17
  5. September 10
  6. July 7
  7. September 20
  8. September 15
  9. September 16
  10. September 18

What is the most common birth month?

Despite the fact that September is so heavily represented in the top 10 most common birthdays, there are actually more births reported in August! All but one August birthday made the list of 100 most common birthdays (the exception being August 3, which lands at 116). Once again, if you do the math, the conception time for August babies lines up with the approach of cooler weather and the holidays, maybe making cuddling up extra appealing. 

What is the least common birthday?

Unsurprisingly, February 29th is the least common birthday. Because Leap Day only rolls around every four years, there’s only a 1/1,461 chance of being born on this day (versus 1/365 for any other given day). This means that Leap Day babies (also called Leapers or Leaplings) are stuck celebrating on February 28th or March 1st (but we think their rare b-day also gives them a great excuse to throw a blowout every four years!). Since so few folks are born on this day, your baby won’t have too many celeb birthday “twins.” Famous Leaplings include rapper Ja Rule, fictional character Superman, motivational speaker Tony Robbins and musician Mark Foster (of Foster the People).

Other Uncommon Birthdays

Other dates that land at the bottom of the list include Christmas, New Year’s Day, Christmas Eve, and Independence Day, the day after Christmas, the day after New Year’s, and dates in late November. The reason? Hospitals are less likely to schedule inductions or c-sections on holidays!

The 13th is also a relatively rare birthday, with January, February, March, April, May, and November 13th all placing among the 50 least common birthdays. Superstition around Friday the 13th appears to be to blame here.

Least Popular Birthdays

  • February 29 (366th)
  • December 25 (365th)
  • January 1 (364th)
  • December 24 (363rd)
  • July 4 (362nd)
  • January 2 (361st)
  • December 26 (360th)
  • November 27 (359th)
  • November 23 (358th)
  • November 25 (357th

Most to Least Common Birthdays

Here's where every birthday ranks!

  1. September 9
  2. September 19
  3. September 12
  4. September 17
  5. September 10
  6. July 7
  7. September 20
  8. September 15
  9. September 16
  10. September 18
  11. December 20
  12. September 26
  13. September 8
  14. September 23
  15. December 29
  16. August 8
  17. September 24
  18. July 8
  19. December 19
  20. August 29
  21. August 15
  22. September 22
  23. December 30
  24. September 14
  25. September 25
  26. September 27
  27. July 1
  28. December 28
  29. August 28
  30. July 2
  31. August 22
  32. September 21
  33. September 13
  34. August 30
  35. July 11
  36. August 16
  37. August 1
  38. July 18
  39. August 20
  40. July 9
  41. July 16
  42. July 25
  43. July 15
  44. August 12
  45. July 10
  46. August 27
  47. August 9
  48. October 1
  49. July 17
  50. July 23
  51. August 14
  52. July 22
  53. August 18
  54. July 14
  55. December 21
  56. December 18
  57. October 3
  58. December 27
  59. July 21
  60. August 23
  61. August 21
  62. August 19
  63. February 14
  64. August 26
  65. July 28
  66. August 5
  67. August 11
  68. July 24
  69. July 30
  70. July 29
  71. June 27
  72. August 7
  73. August 6
  74. July 26
  75. August 2
  76. August 25
  77. October 2
  78. September 29
  79. August 4
  80. November 21
  81. July 12
  82. June 28
  83. October 10
  84. August 31
  85. September 28
  86. August 17
  87. June 30
  88. July 19
  89. May 23
  90. July 31
  91. September 11
  92. June 20
  93. August 10
  94. October 4
  95. September 30
  96. July 6
  97. December 17
  98. August 13
  99. August 24
  100. November 20
  101. December 12
  102. September 5
  103. July 20
  104. July 27
  105. June 25
  106. September 7
  107. December 22
  108. June 26
  109. May 24
  110. December 16
  111. June 29
  112. November 1
  113. June 2
  114. June 18
  115. October 6
  116. August 3
  117. June 24
  118. October 7
  119. October 8
  120. November 7
  121. July 3
  122. June 21
  123. October 17
  124. September 6
  125. June 14
  126. May 22
  127. May 16
  128. October 24
  129. October 5
  130. October 11
  131. June 16
  132. October 15
  133. June 3
  134. November 19
  135. May 21
  136. June 17
  137. December 1
  138. June 23
  139. June 6
  140. November 14
  141. November 15
  142. June 10
  143. June 4
  144. April 4
  145. September 4
  146. June 12
  147. May 20
  148. November 5
  149. December 15
  150. February 15
  151. October 25
  152. December 2
  153. March 21
  154. July 13
  155. November 8
  156. June 19
  157. November 18
  158. June 5
  159. June 1
  160. June 7
  161. June 11
  162. May 15
  163. October 22
  164. October 18
  165. October 14
  166. February 7
  167. December 3
  168. November 11
  169. March 17
  170. October 9
  171. December 5
  172. November 3
  173. June 22
  174. March 1
  175. November 4
  176. November 17
  177. May 17
  178. September 3
  179. March 14
  180. October 16
  181. May 2
  182. February 22
  183. October 28
  184. March 7
  185. June 9
  186. November 6
  187. November 2
  188. June 15
  189. November 12
  190. March 3
  191. May 5
  192. May 10
  193. May 14
  194. October 20
  195. February 8
  196. April 11
  197. October 21
  198. February 28
  199. January 24
  200. October 23
  201. March 28
  202. June 13
  203. May 9
  204. November 10
  205. October 27
  206. June 8
  207. January 10
  208. November 16
  209. January 4
  210. May 12
  211. February 10
  212. February 11
  213. October 12
  214. October 29
  215. March 15
  216. February 21
  217. April 2
  218. April 18
  219. March 12
  220. March 20
  221. May 1
  222. September 2
  223. May 19
  224. April 25
  225. March 4
  226. December 4
  227. March 5
  228. March 8
  229. January 14
  230. January 11
  231. March 25
  232. February 25
  233. March 22
  234. December 6
  235. May 8
  236. March 18
  237. January 5
  238. April 12
  239. December 14
  240. December 10
  241. January 25
  242. May 6
  243. February 2
  244. February 16
  245. May 7
  246. February 18
  247. March 10
  248. January 12
  249. March 11
  250. September 1
  251. February 1
  252. October 26
  253. February 23
  254. November 9
  255. January 7
  256. March 24
  257. March 6
  258. March 19
  259. January 6
  260. April 16
  261. February 4
  262. February 24
  263. May 3
  264. January 17
  265. May 30
  266. April 5
  267. May 18
  268. April 3
  269. February 12
  270. April 17
  271. March 27
  272. February 9
  273. December 8
  274. April 19
  275. April 8
  276. March 26
  277. February 20
  278. January 18
  279. January 31
  280. December 11
  281. April 15
  282. April 26
  283. April 22
  284. March 29
  285. January 23
  286. April 23
  287. April 7
  288. February 27
  289. November 30
  290. December 13
  291. February 17
  292. October 19
  293. December 9
  294. April 24
  295. January 26
  296. February 3
  297. January 28
  298. April 9
  299. May 25
  300. April 10
  301. January 20
  302. January 21
  303. January 27
  304. April 21
  305. October 30
  306. January 3
  307. April 14
  308. April 28
  309. March 2
  310. May 28
  311. February 6
  312. May 29
  313. March 31
  314. March 16
  315. October 13
  316. March 9
  317. November 29
  318. January 30
  319. May 11
  320. November 13
  321. December 7
  322. March 23
  323. April 29
  324. April 30
  325. February 26
  326. May 31
  327. May 4
  328. April 20
  329. March 30
  330. May 13
  331. May 27
  332. January 19
  333. February 5
  334. January 22
  335. February 19
  336. April 27
  337. November 22
  338. March 13
  339. April 6
  340. January 9
  341. January16
  342. January 13
  343. January 8
  344. February 13
  345. January 29
  346. January 15
  347. July 5
  348. May 26
  349. December 31
  350. April 13
  351. December 23
  352. April 1
  353. November 28
  354. November 26
  355. November 24
  356. October 31
  357. November 25
  358. November 23
  359. November 27
  360. December 26
  361. January 2
  362. July 4
  363. December 24
  364. January 1
  365. December 25
  366. February 29

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Disclaimer: The information on our site is NOT medical advice for any specific person or condition. It is only meant as general information. If you have any medical questions and concerns about your child or yourself, please contact your health provider.