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Summary
9 out of 10 of the most common birthdays are in September.
However, August is the most commmon birth month, with an average of 361,709 August babies each year in the United States.
February is the least common birth month, with avereage of 316,891 babies born in February annually.
Tuesday is the most common day of the week for births in America.
The highest percentage of births occur at 8 a.m. and noon.
There were 3,659,289 births in the United States in 2021
The ratio of sexes at birth is 1.05 males per 1 female in the U.S.
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.
The 10 Most Popular Birthdays
September 9th
September 19th
September 12th
September 17th
September 10th
July 7th
September 20th
September 15th
September 16th
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
December 25th
January 1st
December 24th
July 4th
January 2nd
December 26th
November 27th
November 23rd
November 25th
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.
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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Author
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.