Ranked: The Most and Least Common Birthdays in America

How Common Is Your Birthday in America?

Key Takeaways

• Eight of America’s 10 most common birthdays fall in September, reflecting a strong seasonal pattern in births.

• Major holidays are among the least common birthdays, a pattern that may partly reflect the scheduling of planned deliveries around these dates.

• December shows a striking contrast: Christmas Day is the rarest regularly occurring birthday, while December 28 ranks sixth most common.

Have you ever wondered how many people share your birthday?

Some birthdays are far more common than others, with seasonal trends and major holidays helping shape the calendar. The differences can be striking, even between dates just a few days apart.

This visualization ranks all 366 calendar dates by total U.S. births, from 1 (most common) to 366 (least common). It draws on 142.6 million births recorded between 1989 and 2024 by the National Center for Health Statistics (NCHS), compiled by RareBirthday.

Want to know where your birthday ranks? Scroll to the bottom of the article for a searchable, sortable table of all 366 dates.

The 25 Most Common Birthdays in America

September dominates the top of the ranking, claiming eight of the first 10 spots. September 9 takes first place, followed by September 20, September 19, and September 14. July 7 breaks the pattern in fifth place, while December 28 ranks sixth despite falling during the year-end holiday period.

The table below shows the 25 most common birthdays.

RankBirthday

1September 9

2September 20

3September 19

4September 14

5July 7

6December 28

7September 12

8September 10

9September 18

10September 21

11September 15

12September 17

13September 16

14September 8

15December 20

16August 16

17September 22

18August 8

19September 27

20September 13

21September 23

22September 25

23August 30

24December 29

25September 26

Why September Dominates the Birthday Calendar

September’s birthday boom is often attributed to conceptions during the winter holidays. But research suggests the explanation goes beyond when people choose to start a family.

A 2020 study following more than 14,000 women in North America and Denmark found that participants were most likely to begin trying for a pregnancy in September. However, after accounting for that timing, their chances of conceiving in a given menstrual cycle peaked in late fall and early winter. The seasonal difference was strongest in the southern United States.

That distinction matters: when people start trying and when they conceive do not necessarily follow the same pattern. The findings suggest September’s popularity reflects a combination of pregnancy planning and seasonal variation in conception, rather than holiday timing alone.

How Holidays Change When Babies Are Born

Excluding February 29, Christmas Day is the rarest birthday, followed by New Year’s Day and Christmas Eve. Independence Day is the fourth rarest among dates that occur every year, while November 24–27 also appear among the 25 least common birthdays overall.

RankBirthday

366February 29

365December 25

364January 1

363December 24

362July 4

361January 2

360December 26

359November 26

358November 25

357November 24

356November 27

355October 31

354November 28

353November 23

352April 1

351December 23

350December 31

349July 5

348January 13

347May 27

346January 15

345March 13

344January 16

343April 13

342February 13

Holiday dips can reflect births shifting to nearby dates. A study using California birth records found approximately 18% fewer births on holidays and the following day. Researchers traced the displaced births to a window stretching from 11 days before the holiday to 16 days afterward.

This offers a possible explanation for December’s contrast. Delivery scheduling can contribute to both a holiday lull and higher birth counts on surrounding dates, although the ranking cannot establish how much it explains December 28’s unusually high position.

Thanksgiving also differs from Christmas in an important way: its date moves each year. Any Thanksgiving-related dip is therefore spread across several late-November dates in a multiyear ranking, rather than concentrated on one fixed date.

Find Your Birthday: All 366 Dates Ranked

The complete ranking includes all 366 calendar dates, including February 29, which ranks last largely because it occurs only once every four years. The rankings are based on total births between 1989 and 2024, without adjusting for how often each date occurred.

Use the searchable, sortable table below to find your birthday and see how it compares with the rest of the calendar.

RankBirthday

1September 9

2September 20

3September 19

4September 14

5July 7

6December 28

7September 12

8September 10

9September 18

10September 21

11September 15

12September 17

13September 16

14September 8

15December 20

16August 16

17September 22

18August 8

19September 27

20September 13

21September 23

22September 25

23August 30

24December 29

25September 26

26July 8

27August 15

28September 24

29December 21

30August 17

31August 28

32August 9

33August 31

34August 10

35July 1

36August 29

37December 30

38August 23

39August 22

40August 24

41July 10

42July 6

43August 14

44July 27

45September 28

46July 2

47July 17

48August 18

49July 11

50August 2

51July 25

52August 1

53July 20

54August 12

55August 20

56December 27

57July 9

58August 21

59July 26

60July 18

61December 19

62July 15

63August 3

64July 21

65July 16

66August 7

67July 14

68July 12

69July 19

70August 27

71October 1

72August 11

73June 28

74July 24

75August 19

76July 28

77July 22

78July 23

79October 2

80October 4

81August 4

82October 3

83August 25

84August 5

85December 18

86June 29

87July 29

88August 26

89August 6

90October 5

91July 30

92July 31

93June 30

94February 14

95September 29

96September 7

97June 27

98September 11

99June 1

100October 10

101September 6

102November 1

103August 13

104July 13

105May 24

106June 21

107November 21

108November 20

109June 22

110September 30

111June 26

112June 20

113June 2

114May 23

115November 2

116June 15

117June 14

118September 5

119June 25

120October 6

121October 11

122December 17

123December 12

124December 22

125September 1

126July 3

127May 22

128June 7

129November 15

130October 25

131June 8

132November 16

133October 12

134June 24

135February 22

136June 18

137October 7

138June 16

139December 1

140June 23

141June 3

142October 18

143October 8

144November 8

145February 15

146November 7

147March 1

148June 5

149June 12

150May 15

151October 24

152May 17

153June 17

154May 18

155December 16

156October 26

157September 4

158October 9

159October 15

160May 10

161October 17

162November 9

163June 4

164May 16

165June 19

166June 6

167December 14

168November 19

169June 10

170May 20

171October 16

172May 21

173February 8

174November 3

175November 14

176December 2

177April 4

178November 17

179January 4

180November 11

181November 5

182November 6

183December 15

184March 17

185March 2

186November 4

187February 2

188November 30

189November 18

190March 22

191March 3

192June 9

193June 11

194October 23

195October 14

196October 20

197March 21

198January 5

199October 19

200May 1

201May 5

202December 3

203September 3

204October 28

205October 22

206February 1

207February 7

208March 23

209December 6

210May 2

211January 11

212January 25

213May 11

214October 27

215March 20

216November 10

217March 8

218March 15

219December 5

220March 9

221December 4

222May 3

223February 16

224May 4

225March 16

226April 12

227February 23

228February 9

229October 21

230November 12

231May 12

232April 5

233May 19

234December 7

235June 13

236January 12

237May 14

238January 18

239April 26

240February 12

241March 7

242March 14

243May 8

244March 28

245May 9

246April 2

247February 10

248January 24

249September 2

250April 25

251February 21

252October 29

253April 3

254March 29

255February 28

256March 30

257April 20

258February 20

259May 25

260April 11

261April 18

262December 13

263March 10

264April 6

265March 4

266April 19

267March 6

268January 6

269January 26

270April 27

271March 24

272January 10

273March 27

274April 24

275January 23

276March 5

277February 24

278December 8

279March 18

280March 25

281April 17

282March 12

283December 10

284April 10

285May 6

286December 11

287March 11

288May 7

289January 17

290May 31

291April 7

292February 27

293March 19

294February 6

295October 30

296February 11

297April 8

298March 26

299February 3

300April 16

301April 14

302April 22

303October 13

304April 21

305January 31

306February 17

307January 20

308April 23

309November 29

310January 19

311April 15

312March 31

313February 25

314November 13

315January 14

316April 28

317January 27

318December 9

319May 30

320November 22

321February 26

322February 18

323January 30

324January 22

325January 3

326January 7

327February 4

328April 9

329February 5

330May 28

331February 19

332April 30

333May 29

334April 29

335January 21

336January 29

337May 26

338January 8

339January 28

340January 9

341May 13

342February 13

343April 13

344January 16

345March 13

346January 15

347May 27

348January 13

349July 5

350December 31

351December 23

352April 1

353November 23

354November 28

355October 31

356November 27

357November 24

358November 25

359November 26

360December 26

361January 2

362July 4

363December 24

364January 1

365December 25

366February 29

For a broader perspective on births around the world, see our visualization of how many babies are born every hour by country.

Learn More on the Voronoi App

If you enjoyed this visualization, check out Total Fertility Rates By Country on the Voronoi app.