Infographic shows most common birthdays

According to a Harvard study, September 16 is the most popular for birthdays. How popular is your birth date?

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Did you notice a lot of birthday notifications on Facebook yesterday? Chances are, you know quite a few people whose birthdays fall in September. In fact, it was my birthday last Tuesday. I share it (reluctantly) with two other friends, my Pilates instructor and a neighbour.

As it turns out, September 16 is the most common birthday of the year, while my birth date—September 9—comes in second. September actually has 10 of the most common birthdays of the year overall—which means that Christmas break is a busy time of year for many couples.

Read more: Kids’ birthday party ideas>

Check out this infographic that was developed to show the most common birth dates over the last two decades. It comes from stats compiled by a Harvard public policy professor that was published in the New York Times in raw data form.

heatmapbirthdays1

December 25 is shown as the least common birth date—and this may speak to doctors’ holidays as much as anything else. However, February 29, which appears once every four years, is technically the least common birth date. Other holidays, like American Thanksgiving and the Fourth of July also have low birth rates.

Once you know the most common birthdays, the conversation naturally turns to the most popular times for conception. The cold weather and December celebrations is credited to the cluster of birthdays in September. July and August are also popular months, which leads me to believe that as soon as the weather starts to chill, couples start to warm up to one another.

Both of my sons were due on March 27, which has a direct line to the July long weekend. And, if you count backwards from my daughter’s Christmas Eve birthday, you end up at my husband’s birthday. (Is this TMI?) I’m not sure why special dates were luckier in our calendar, but I’m happy that they were.

When is your birthday? How about your kids? Can you find a link between their birthday and a special occasion in your life?

Emma Waverman is a writer, blogger and mom to three kids. She has many opinions, some of them are fit to print. Read more of her articles here and follow her on Twitter @emmawaverman.

23 comments on “Infographic shows most common birthdays

  1. My sister and I are Sept 18th and Sept 25th. My mom likes to tell us it was the bubbly at Christmas and New Year’s :)

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  2. I am an LC working with many families. I find birthdays within extended families may be clustered. My own family are concentrated in January and April. I think fertility patterns may have a familial base.

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    • There may be some truth in that…my family has what I refer to as “the birthday season”. It starts with me in November, continues to my dad in December, and the most of my family in January (7 birthdays in all)…that’s why I counted back from January and said “no” for those couple of months that could’ve resulted in yet another January baby. For us, the August baby was just the luck of the draw, and desperately working to avoid the dreaded birthday season!

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  3. One of my daughters have quite an unusual birthday, Jan 1st. Right on her due date and naturally

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  4. Ours was most definitely a post deployment baby, after not seeing each other for a year, it was bound to happen lol 😉 he was also born a week after my birthday (jan 11th & jan 19th)

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  5. I’m surprised November isn’t more popular…it’s 9months from February/Valentine’s Day! My Mother, younger Brother and I are all November babies, all around the 14th LOL

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    • My grandmother and I share April 29th as our birthday. When I became pregnant a couple months after her death, I KNEW my son would also share our birthday! Sure, enough, the first day I felt like getting out a little after having bronchitis was my birthday. Not long into shopping the contractions started. Yep, Chris and I now share April 29th. I feel like my grandmother is still with me ! What a blessing.

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  6. My kids are june 8 and april 8 — traceable to being right where we wanted them. I did not want to be 2nd or 3rd trimester in the heat, so we started trying in may and agreed if we weren’t sucessful by sept we’d stop trying until may the following year.

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  7. My first child was born July 1: nine months after daddy returned from a long hunting trip. My second was born April 27: nine months after we found out an adoption that we were hoping and praying for fell through.

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  8. Ha! Lol, My Birthday is September 9th! Yeah Happy belated Birthday! I only a very few that share this birthday!

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  9. September 16… right here!

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  10. If you notice there is a spike on February 14th. I’m assuming that’s because sex can bring on labor…. And yes I know from experience. He was one month early to the day and was quite a surprise. All my babies were in the late winter or early spring. It definitely want by design but I love having spring babies. Cold and flu season is almost over, you don’t have to bundle them up within an inch of there life, they’re right in the middle of the school year. Spring makes the best birthdays.

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  11. wow. who knew that my birthday, september 16th was the most popular? i guess i know now!
    my son born on 3.12 was conceived on my honeymoon (i’d say that was a special occasion, wouldn’t you?).

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  12. My oldest ‘s birthday is 9 months after the Vancouver Olympics (where we are). My second daughter’s is 9 months after my oldest ‘s birthday. Not sure if we’ll share those connections with them anytime soon.

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  13. Yep 9 1/2 months after my husband suprised me with vikings tickets when they faced the colts, I’m a huge payton manning fan…our suprise daughter was born…. guess I was way to exited to see payton in person, and way to grateful later that evening… my little souvenir.

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  14. Feb. 5 wedding anniversary equals 3 kids born in mid Oct .two on 15th one the 20th

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  15. I share Sept 9th with three of my friends and I guess awell as you

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  16. It’s almost comical to look at how there are a spike in births on Valentine’s day (Feb 14th) – but than massive statistically significant dips on July 4th & 5th, the 4th week in November, and Christmas time…it’s almost as if the women are telling the baby to stick in there a couple days longer so they can just ‘make it’ through the holiday season.

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  17. my birthday is sept 16, so i laughed pretty hard at this. it is the mexican independance day no one knows about.

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  18. Yeah…. My birthday is exactly 9 months after my mom’s.

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  19. I’ll vouch for that, I have a friend whose birthday is the 16th September, then my mom’s on the 23rd, my niece on the 24th, my brother on the 27th and finally my nephew on the 28th.
    September is a very expensive month for me. :-(

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  20. Christmas. There’s your answer. Two of our three kids are born around this time: Sept 15th and Sept 12th. When each was conceived, myself and my wife were on Christmas holidays. I’d guess that Sept 16th is a popular birthday because of people having fun at Christmas. :-)

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  21. my brothers are both born in september, 6th and 26th! im born in november 18th, which is slightly popular, while my parents are both born on not as popular days of the year, nov 7th and march 28th. cant seem to find any special links unfortunatly :(

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