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9 Fascinating Facts About September Babies

We wouldn’t go as far as to say that September babies are the best or anything, but it turns out that they might be tallest and share their birthday with Beyoncé (so yeah, pretty awesome). Here, nine fun facts to know about people born in September.

21 Autumn-Inspired Baby Names That You’ll Totally Fall For


mom swinging her boy around outside on a september day
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They Share Their Birthday with a Lot of People

It turns out that September is the busiest month for births, with September 9 clocking in as the most common birthday in the U.S. Guess that means a lot of parents are busy getting busy around the holiday season. (Hey, that’s one way to keep warm.)  

They May Have the Upper Hand at School

In many schools across the country, the cutoff date for starting kindergarten is September 1, which means that September babies are often the oldest and most developed in their class. A recent study from the University of Toronto, Northwestern University and the University of Florida found that this advantage begins around age five and carries through as kids get older. The researchers found that September babies are more likely to attend college and less likely to get sent to jail for committing a juvenile crime.

cute baby boy playing outside in autumn leaves
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They’re More Likely to Live to 100

A study from the University of Chicago found that those born between September and November are more likely to live to the age of 100 than those born in other months of the year. Researchers hypothesized that the reason is because seasonal infections or seasonal vitamin deficiency early in life can cause long-lasting damage to a person’s health. 

They’re Either Virgos or Libras

Virgos (born between August 23 and September 22) are said to be loyal, dedicated and hardworking while Libras (born between September 23 and October 22) are sociable, charming and sincere. 


They May Be Taller Than Their Friends

One study from Bristol University in the U.K. found that kids born in late summer and early autumn were slightly taller (by 5mm) than babies born in winter and spring. The most likely reason? Moms-to-be get more sun exposure and vitamin D in the third trimester, which aids the baby’s growth.

sweet little girl outside in a field on a september day
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They Have Stronger Bones

The same Bristol University study found that kids born in late summer and early autumn had thicker bones (by 12.75 square centimeters) than those born at other times. Which is good news for September babies since wider bones are thought to be stronger and less prone to breaking.

Their Birthstone Is Sapphire

Aka the beautiful blue gem that will add instant sophistication to any outfit. It’s also the birthstone that is associated with loyalty and integrity.


cute baby boy picking apples in fall
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They’re More Prone to Asthma

They may have stronger bones, but a Vanderbilt University study found that those born during autumn months are 30 percent more likely to suffer from asthma (sorry). Researchers think it’s because babies born right before winter are more susceptible to colds and viral infections.

They Share Their Birth Month with Some Pretty Awesome People

Including Beyoncé (September 4), Bill Murray (September 21), Sophia Loren (September 20) and Jimmy Fallon (September 19). Did we mention Beyoncé?

Their Birth Flower Is Morning Glory

These beautiful blue trumpets bloom in the early hours and are symbols of affection. In other words, they’re the perfect birthday gift. Happy birthday, September babies!



Alexia Dellner profile shot v2

Executive Editor

  • Lifestyle editor focusing primarily on family, wellness and travel
  • Has more than 10 years experience writing and editing
  • Studied journalism at the University of Westminster in London, UK