The Most (And Least) Common Birthdays In The US

By Kathy Morris - Aug. 21, 2020

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Happy birthday to you, and you, and many more.

It’s not uncommon to share a birthday with someone you know. Anyone who has ever had a communal office birthday cake knows some months the cake has more names iced on than others.

It turns out, it’s not just days that are more common, but some months (And one in particular!) are booming when it comes to births and some months when the delivery room is downright slow.

10 Most Popular Birthdays

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

September is a busy month for delivering babies! And for birthday cakes, party hats, and other birthday related accessories. 9 of the 10 most popular birthdays are in September. The one not in September? July 7th, just 3 days after Independence Day.

For those struggling to do the math, 9 months before these popular September birthdays is a slew of December dates, including December 25th.

Which is kind of funny, considering the least popular birth dates…

10 Least Popular Birthdays

  1. December 25th
  2. January 1st
  3. December 24th
  4. July 4th
  5. January 2nd
  6. December 26th
  7. November 27th
  8. November 23rd
  9. November 25th
  10. October 31st

While holidays are a popular time for baby making, babies are less likely to be born on popular holidays. Christmas, New Years, Christmas Eve, July 4th, Halloween, and some suspiciously Thanksgiving days all make the top 10 least common birthdays.

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In a world of scheduled c-sections and inductions, doctors and delivery staff prefer to be home with their families on the big holidays than helping expand someone else’s families. Another day where births are less common? The 13th. Guess people are still superstitious about the “unlucky” day.

How We Determined This (And The Full Calendar)

To rank the most common birthdays, we used data aggregated by FiveThirtyEight on the number of births on each day between 1994 to 2014..

This data set took birth data for the years 1994 to 2003, from the Centers for Disease Control and Prevention’s National Center for Health Statistics. U.S. births data for births between 2000 to 2014 came from the Social Security Administration. The more babies born on average, the more common the birthday.

The calendar featured at the top of the article is a simple heat map of the data. The deeper the blue, the more people with that birth date. The deeper red, the less birth dates. It is worth noting that the deepest red is for months with no 31st day.

You can see the full calendar year and how common of a birthday your special day is below.

How common of a birth date is each day in the calendar year?

Birth Date Popularity Average Births
1/1 365th 7,792
1/2 362nd 9,307
1/3 306th 10,813
1/4 209th 11,019
1/5 237th 10,953
1/6 259th 10,911
1/7 255th 10,925
1/8 343rd 10,610
1/9 340th 10,624
1/10 207th 11,023
1/11 230th 10,975
1/12 248th 10,934
1/13 342nd 10,622
1/14 228th 10,976
1/15 346th 10,546
1/16 341st 10,623
1/17 264th 10,901
1/18 278th 10,883
1/19 332nd 10,691
1/20 301st 10,825
1/21 302nd 10,824
1/22 334th 10,673
1/23 285th 10,865
1/24 199th 11,049
1/25 240th 10,951
1/26 295th 10,843
1/27 303rd 10,823
1/28 297th 10,835
1/29 345th 10,567
1/30 318th 10,752
1/31 278th 10,883
2/1 251st 10,929
2/2 242nd 10,949
2/3 295th 10,843
2/4 261st 10,905
2/5 333rd 10,685
2/6 311th 10,794
2/7 164th 11,149
2/8 195th 11,063
2/9 272nd 10,893
2/10 211th 11,015
2/11 211th 11,015
2/12 269th 10,898
2/13 344th 10,604
2/14 63rd 11,636
2/15 150th 11,188
2/16 244th 10,948
2/17 291st 10,854
2/18 246th 10,940
2/19 334th 10,673
2/20 277th 10,886
2/21 216th 11,008
2/22 182nd 11,111
2/23 253rd 10,927
2/24 262nd 10,904
2/25 231st 10,974
2/26 325th 10,727
2/27 288th 10,858
2/28 198th 11,053
2/29 347th 10,462
3/1 174th 11,129
3/2 309th 10,802
3/3 190th 11,074
3/4 225th 10,989
3/5 227th 10,979
3/6 256th 10,921
3/7 184th 11,087
3/8 228th 10,976
3/9 316th 10,765
3/10 246th 10,940
3/11 249th 10,931
3/12 219th 11,003
3/13 338th 10,654
3/14 178th 11,119
3/15 215th 11,011
3/16 314th 10,773
3/17 169th 11,137
3/18 236th 10,954
3/19 258th 10,914
3/20 219th 11,003
3/21 153rd 11,181
3/22 233rd 10,967
3/23 322nd 10,739
3/24 256th 10,921
3/25 231st 10,974
3/26 276th 10,888
3/27 271st 10,895
3/28 201st 11,045
3/29 284th 10,873
3/30 328th 10,714
3/31 313th 10,779
4/1 353rd 10,300
4/2 217th 11,004
4/3 267th 10,899
4/4 144th 11,219
4/5 266th 10,900
4/6 339th 10,639
4/7 287th 10,859
4/8 275th 10,890
4/9 298th 10,830
4/10 300th 10,826
4/11 196th 11,059
4/12 237th 10,953
4/13 351st 10,389
4/14 307th 10,812
4/15 278th 10,883
4/16 260th 10,909
4/17 270th 10,897
4/18 217th 11,004
4/19 274th 10,891
4/20 328th 10,714
4/21 304th 10,817
4/22 283rd 10,877
4/23 286th 10,864
4/24 294th 10,845
4/25 224th 10,996
4/26 282nd 10,882
4/27 336th 10,664
4/28 308th 10,803
4/29 323rd 10,735
4/30 324th 10,731
5/1 221st 11,002
5/2 181st 11,113
5/3 263rd 10,903
5/4 327th 10,717
5/5 191st 11,073
5/6 242nd 10,949
5/7 245th 10,945
5/8 235th 10,955
5/9 203rd 11,040
5/10 192nd 11,071
5/11 319th 10,744
5/12 210th 11,016
5/13 330th 10,697
5/14 193rd 11,070
5/15 162nd 11,157
5/16 127th 11,283
5/17 177th 11,122
5/18 267th 10,899
5/19 223rd 10,999
5/20 147th 11,193
5/21 135th 11,254
5/22 125th 11,288
5/23 89th 11,525
5/24 109th 11,367
5/25 299th 10,827
5/26 349th 10,401
5/27 331st 10,693
5/28 310th 10,797
5/29 312th 10,782
5/30 264th 10,901
5/31 326th 10,719
6/1 158th 11,164
6/2 113th 11,345
6/3 133rd 11,256
6/4 143rd 11,221
6/5 158th 11,164
6/6 139th 11,240
6/7 160th 11,160
6/8 206th 11,025
6/9 185th 11,083
6/10 142nd 11,222
6/11 160th 11,160
6/12 146th 11,196
6/13 202nd 11,041
6/14 125th 11,288
6/15 188th 11,078
6/16 131st 11,265
6/17 136th 11,253
6/18 114th 11,339
6/19 156th 11,176
6/20 92nd 11,502
6/21 122nd 11,298
6/22 172nd 11,130
6/23 138th 11,244
6/24 117th 11,328
6/25 105th 11,406
6/26 108th 11,374
6/27 71st 11,590
6/28 82nd 11,557
6/29 111th 11,351
6/30 87th 11,547
7/1 27th 11,860
7/2 30th 11,828
7/3 121st 11,304
7/4 363rd 8,796
7/5 348th 10,404
7/6 96th 11,487
7/7 6th 12,108
7/8 18th 11,944
7/9 40th 11,769
7/10 45th 11,738
7/11 35th 11,794
7/12 81st 11,565
7/13 153rd 11,181
7/14 54th 11,680
7/15 43rd 11,754
7/16 41st 11,768
7/17 49th 11,718
7/18 38th 11,772
7/19 88th 11,545
7/20 103rd 11,428
7/21 59th 11,664
7/22 52nd 11,686
7/23 50th 11,699
7/24 68th 11,607
7/25 41st 11,768
7/26 74th 11,581
7/27 104th 11,410
7/28 65th 11,614
7/29 70th 11,593
7/30 69th 11,599
7/31 90th 11,516
8/1 37th 11,775
8/2 75th 11,580
8/3 116th 11,332
8/4 79th 11,569
8/5 66th 11,610
8/6 73rd 11,586
8/7 72nd 11,589
8/8 16th 11,951
8/9 47th 11,721
8/10 93rd 11,491
8/11 67th 11,608
8/12 44th 11,749
8/13 98th 11,468
8/14 51st 11,692
8/15 21st 11,921
8/16 36th 11,788
8/17 86th 11,548
8/18 53rd 11,681
8/19 62nd 11,637
8/20 39th 11,771
8/21 61st 11,643
8/22 31st 11,825
8/23 60th 11,655
8/24 99th 11,452
8/25 76th 11,576
8/26 64th 11,620
8/27 46th 11,737
8/28 28th 11,855
8/29 20th 11,924
8/30 34th 11,800
8/31 84th 11,555
9/1 250th 10,930
9/2 222nd 11,000
9/3 178th 11,119
9/4 145th 11,216
9/5 102nd 11,431
9/6 124th 11,293
9/7 106th 11,398
9/8 13th 11,992
9/9 1st 12,301
9/10 5th 12,143
9/11 91st 11,503
9/12 3rd 12,224
9/13 33rd 11,801
9/14 24th 11,882
9/15 8th 12,087
9/16 9th 12,072
9/17 4th 12,148
9/18 10th 12,055
9/19 2nd 12,229
9/20 7th 12,107
9/21 32nd 11,813
9/22 22nd 11,920
9/23 14th 11,974
9/24 17th 11,945
9/25 25th 11,866
9/26 12th 11,993
9/27 26th 11,861
9/28 85th 11,554
9/29 77th 11,572
9/30 95th 11,489
10/1 48th 11,720
10/2 77th 11,572
10/3 57th 11,674
10/4 94th 11,490
10/5 129th 11,272
10/6 115th 11,335
10/7 118th 11,324
10/8 119th 11,309
10/9 169th 11,137
10/10 83rd 11,556
10/11 130th 11,268
10/12 213th 11,014
10/13 315th 10,768
10/14 164th 11,149
10/15 132nd 11,261
10/16 180th 11,115
10/17 123rd 11,296
10/18 164th 11,149
10/19 292nd 10,850
10/20 194th 11,065
10/21 197th 11,057
10/22 163rd 11,156
10/23 200th 11,046
10/24 128th 11,276
10/25 151st 11,183
10/26 252nd 10,928
10/27 205th 11,032
10/28 183rd 11,102
10/29 214th 11,012
10/30 305th 10,815
10/31 357th 9,978
11/1 112th 11,350
11/2 186th 11,081
11/3 172nd 11,130
11/4 174th 11,129
11/5 148th 11,191
11/6 186th 11,081
11/7 120th 11,308
11/8 155th 11,180
11/9 253rd 10,927
11/10 204th 11,039
11/11 168th 11,141
11/12 189th 11,077
11/13 320th 10,742
11/14 139th 11,240
11/15 141st 11,229
11/16 208th 11,022
11/17 176th 11,125
11/18 157th 11,173
11/19 134th 11,255
11/20 100th 11,442
11/21 80th 11,567
11/22 336th 10,664
11/23 359th 9,883
11/24 356th 10,015
11/25 358th 9,954
11/26 355th 10,044
11/27 360th 9,718
11/28 354th 10,096
11/29 317th 10,764
11/30 289th 10,855
12/1 137th 11,251
12/2 152nd 11,182
12/3 167th 11,142
12/4 226th 10,981
12/5 171st 11,132
12/6 234th 10,958
12/7 321st 10,741
12/8 272nd 10,893
12/9 293rd 10,849
12/10 240th 10,951
12/11 278th 10,883
12/12 101st 11,440
12/13 289th 10,855
12/14 239th 10,952
12/15 148th 11,191
12/16 110th 11,352
12/17 97th 11,481
12/18 56th 11,675
12/19 19th 11,935
12/20 11th 12,009
12/21 54th 11,680
12/22 107th 11,388
12/23 352nd 10,338
12/24 364th 8,069
12/25 366th 6,574
12/26 361st 9,543
12/27 58th 11,665
12/28 28th 11,855
12/29 15th 11,956
12/30 23rd 11,889
12/31 350th 10,394

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Kathy Morris

Author

Kathy Morris

Kathy is the head of content at Zippia with a knack for engaging audiences. Prior to joining Zippia, Kathy worked at Gateway Blend growing audiences across diverse brands. She graduated from Troy University with a degree in Social Science Education.

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