Knowing your due date means knowing much more than when you can expect your little one to arrive. It will determine anything and everything from the logistics around your labor and delivery to the time of year your child will celebrate their birthday.
Curious to know if your kid on the way will be celebrating during the most common birthday month along with plenty of classmates? Or maybe they'll be born on the least common day of the year for babies to make their big entrance into the world? Here's the scoop on the most common birthdays in the U.S.
Why You Shouldn't Focus on Your Due Date
What the Data Says About the Most Common Birthdays
According to real birth data (covering 20 years of American births) gathered by FiveThirtyEight from the National Center for Health Statistics and Social Security Administration, September is the most popular month to give birth to a child in the U.S. In fact, nine of the top 10 days to give birth fall between September 9 and September 20.
"If you back up 38 weeks, that means many couples are conceiving in December and around the holidays," explains Whitney Casares, MD, MPH, FAAP, author of The New Baby Blueprint: Caring for You and Your Little One. "It makes sense that they may be more likely to conceive during more celebratory seasons."
Another reason, Dr. Casares points out: According to a study in Obstetrics and Gynecology, couples may have more luck conceiving during the winter season due to higher-quality sperm in winter versus summer months. "They also postulated that changes in daylight length might make an ovum’s environment better-suited for a sperm," she notes. "More research is needed to understand this interesting phenomenon.
Your Chances of Getting Pregnant, During Every Phase of Your Cycle
September 9, the most common birthday in the U.S., is shared by comedian Adam Sandler, actor Hugh Grant, jazz singer Michael Bublé, Russian literary giant Leo Tolstoy, and Colonel Sanders, the founder of KFC. September 19 is the second most common birthday, followed by September 12, September 17, September 10, and the first non-September date in the mix: July 7.
Top 10 Most Common Birthdays
Rank
Date
U.S. Average Daily Births
1st
September 9 (9/9)
12,301
2nd
September 19 (9/19)
12,229
3rd
September 12 (9/12)
12,224
4th
September 17 (9/17)
12,148
5th
September 10(9/10)
12,143
6th
July 7 (7/7)
12,108
7th
September 20 (9/20)
12,107
8th
September 15 (9/15)
12,087
9th
September 16 (9/16)
12,072
10th
September 18 (9/18)
12,055
The Least Common Birthdays
The least common birthdays in the U.S. interestingly all hover around major holidays. December 25 (Christmas Day) is the least common birthday, while January 1 (New Year's Day) is the second least common. December 24 (Christmas Eve) also makes the list as the 3rd least common birthday while July 4 (Independence Day) is the 4th least common birthday.
Several of the least common birthdays also hover around Thanksgiving (the fourth Thursday in November), which can fall anywhere between November 22 and November 28. The 10th least common birthday is October 31 (Halloween).
Top 10 Least Common Birthdays
Rank
Date
U.S. Average Daily Births
366th
December 25 (12/25)
6,574
365th
January 1 (1/1)
7,792
364th
December 24 (12/24)
8,069
363rd
July 4 (7/4)
8,796
362nd
January 2 (1/2)
9,307
361st
December 26 (12/26)
9,543
360th
November 27 (11/27)
9,718
359th
November 23 (11/23)
9,883
358th
November 25 (11/25)
9,954
357th
October 31 (10/31)
9,978
The Bottom Line
So if you happen to be expecting around the holidays, your child likely won't have all that much competition for celebration growing up. But if you happened to conceive during the holidays, get ready for an avalanche of cupcakes and many performances of the "Birthday Song" come September.
Parents uses only high-quality sources, including peer-reviewed studies, to support the facts within our articles. Read our editorial process to learn more about how we fact-check and keep our content accurate, reliable, and trustworthy.
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.
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.
December 25 is still the rarest birthday, with only about 6500 babies born that day. The next least common birthdays are January 1, December 24, July 4, January 2, December 26, November 27, November 23, November 25, and October 31.
The data comes from the Centers for Disease Control and Prevention and the Social Security Administration. The rarest month to be born in is February, making Aquarius the rarest zodiac sign.
According to the Associated Press, there are about 5 million people worldwide who share the Leap Day birthday out of about 8 billion people on the planet. It's the rarest birth date on the planet with only a 1 in roughly 1,460 chance of being born on this date.
The sample included 5294 females aged 21-23 years. Results demonstrated that females born in spring (May) were rated as being significantly more attractive than those born in autumn (September and November). Effect of the month of birth on physical attractiveness.
February 29th: February 29th (Leap Day during Leap Year) is the rarest birthday with only a one in roughly 1,460 chance of being born on this date. February is one of the least popular months for new births. The second rarest birthday is Christmas Eve, December 24th.
“The Center for Disease Control and Prevention tracks birth data nationwide, and July through October are the busiest birth months, with August typically having the highest number of births.
Conclusion. A golden birthday, double golden birthday, or triple golden birthday are all rare events that won't repeat in your life. Hence, having a grand golden birthday celebration with the perfect gift will allow the birthday celebrant to have all the fun on these days. Fortunately, the Celebrate.
First, a look at the science – is there really a "best" month to get pregnant? The short answer is no, there's no "best" time to get pregnant. But the most popular time to conceive a baby in the U.S. is November 25 to December 2, per one study published in Human ReproductionOpens a new window.
After analyzing birth data, researchers have found that September 9th emerges as one of the most common birthdays in the United States. This intriguing finding suggests a higher number of births around this date than any other time of the year.
See why October is the most successful birth month and which ones are close behind. It's no surprise that expecting parents like to imagine every possible detail—every what-if—of their baby-to-be.
February 3rd is. the only day when no one in history has ever been born. Despite much scientific study, there's no explanation for this phenomena. Historically, it has been referred to as the empty day. or nobody's birthday.
The least common birth month is predictably February, which only has 28 days. Birth months of the year, in order of most common to least common: August.
What are the rarest birthdays? February 29th: February 29th (Leap Day during Leap Year) is the rarest birthday with only a one in roughly 1,460 chance of being born on this date. February is one of the least popular months for new births.
Only one May birthdate cracks the top 100 popular birthdays (May 23rd lands in 89th place). Meanwhile six May birthdays fall in the bottom 50 (the 4th, 11th, 13th, 26th, 27th, and 31st).
The survey also found that the most uncommon day to be born on is May 22nd. May is classed as a lucky month to be born on, so if you're born on 22nd, you're extra lucky in my opinion! Please share this if you know other people who share this birthday, and happy birthday to all you October 5's!
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