Skip to main content

What is the most common birthday month? The holidays play a key factor

The most common birthday dates (and the most common month) have one thing in common...

A light box with the word birthday on the top and confetti all around
Image used with permission by copyright holder

Have you noticed there’s a specific month when everyone in your child’s class has a birthday? Notice months that no one seems to have a birthday at all? There’s a reason for that, and it has to do with the timing of the holidays. The most common birthday month that will keep you baking treats for your children’s friends and have you constantly running from birthday party to birthday party is at the start of the school year for a reason.

Every child seems to be born in this month

No secret to September

Yes, September has the most common birthday dates. Why? Well, do the math backward, and where does that land you? During the holidays! And what do we do during the holidays?

Between the parties, gatherings, the holiday spirit — and perhaps the holiday drinks — we are in better moods, which leads to more adults enjoying each other’s company. Plus, it’s cold outside and we stay indoors longer. Track those nine months, and September is where the babies land.

The most common birthdays in order

  • September 9, 19, 12, 17, 10

It’s interesting to see the most common birthday days are all close together without any outliers.

The lonely birthdays

Going the other way, some months let parents take a break from keeping up with party invites.

February doesn’t get the love

February might be the month of love, but the smallest number of birthdays happen during the shortest month of the year. When you backtrack nine months, it’s also when people are outside more than they are inside anyway. If you have a February baby, chances are they won’t meet their birthday buddy anytime soon.

Least common birthday days

  • Christmas Day, New Year’s Day, Christmas Eve, July 4th (in that order)

Not that you would want your birthday on Christmas (your presents always get lumped together), but finding a special day during the busiest season to celebrate could be tricky.

Since we know it’s nine months after most of these holidays when the babies drop, it’s not surprising that those dates see the fewest birthdays. The least popular, and the least wanted birthdays are on the holidays.

A group of children celebrating a birthday
Image used with permission by copyright holder

The busiest month

The most popular birthdays are all in September, but what about the month that has the most births overall? Like tax season and the holiday season, the CDC tracks the busiest months for what we could call baby season.

Baby season

  • July through October
  • August sees the most births

Steer clear of the delivery ward during August. In 2021, Leos came in droves, with 329,978 born during the month. Since 2019, only July beat out August for total births, which happened in 2020.

Though it’s common to find a birthday twin, your chances are greater if you have a birthday in certain months. But if your birthday is in September, you’re either in great company, or fighting to remember all of the cards you need to send out, thanks to the happiness of the holidays.

Go check where the birthdays of your children, friends, and family members fall and see if their birthdays are some of the most — or least — popular on the calendar.

Editors' Recommendations

Dannielle Beardsley
Dannielle has written for various websites, online magazines, and blogs. She loves everything celebrity and her favorite…
Can pregnant women eat salmon? It depends on these factors
How to safely eat this favorite fish while pregnant
Cooked salmon on a plate

Figuring out what you're allowed to eat and not allowed to eat while pregnant can be a time-consuming task and takes mental energy you just don't have. You know sushi is off the list, but what about cooked salmon?

Certain fish is not only safe to eat during pregnancy, but even recommended. However, how you prepare it and how often you can eat it are other matters. (They just have to make it difficult, don't they?) Read on to find out where salmon falls on the list of pregnancy-safe fish and how often you can eat it during pregnancy.

Read more
Can pregnant women eat shrimp? What you need to know
How to safely eat shrimp during pregnancy
Pregnant woman on a bed

There are a lot of rules about what pregnant women should and shouldn't eat, so it's not surprising that many wonder if pregnant women can eat shrimp. After all, there are concerns about many different foods and varieties of seafood that aren't safe for pregnant women to consume, but is shrimp included in that list?

Can pregnant women eat shrimp?
You've probably heard warnings against pregnant women eating certain seafood while pregnant, including seafood high in mercury content like fresh tuna, swordfish, and shark. Fortunately, seafood like shrimp contains only low levels of mercury, making it safe for pregnant women to eat. Although shrimp is considered safe for pregnant women to eat, the FDA suggests that they limit how much seafood they eat weekly. A general guideline is no more than 8 to 12 ounces of seafood per week.

Read more
What is 4-month sleep regression (and how to keep it from ruining your life)
Here's what you need to know if you're dealing with 4-month sleep regression
A mother watching her baby sleep in their crib.

A good night's sleep is hard to get when you have a baby. So, when your little one starts sleeping for longer stretches, and dare we say through the night, it is a cause for concern. Not many parents may have heard of 4-month sleep regression, even though they may be experiencing it. Four-month sleep regression is perfectly normal and happens to some little ones around the 3- to 4-month mark. Of course, when baby isn't sleeping, neither is anyone else in the house. Here's everything you need to know about 4-month sleep regression, including when your baby will start going down for the night once again.

A guide to 4-month sleep regression
By the time babies are 2 to 3 months old, they typically sleep for 5 or 6 hours stretches. By 4 months, babies can sleep through the night without being fed. Whether a baby does depends on the child. Most babies will sleep for that heavenly stretch of 7 to 8 hours by the 4-month mark. If your kiddo has been snoozing for a solid 8 hours at night and has suddenly stopped, you could be dealing with 4-month sleep regression.
What is 4-month sleep regression?
When babies around the age of 3 to 4 months start having trouble sleeping through the night again, it could be a sleep regression period. Regression means to revert or go back to a previous pattern. This is what happens with sleep regression. Babies begin to have trouble falling or staying asleep at night and during their usual naptimes, regressing to those short intervals of slumber you thought had gone by the wayside.
When can 4-month sleep regression occur?
Despite the name, 4-month sleep regression can happen at any time. This change in sleep pattern typically happens to babies at around the 3- to 4-month mark.
How long does 4-month sleep regression last?
It may seem like ages, but 4-month sleep regression doesn't usually hang around for long. Provided parents make an effort to keep baby's sleep routine consistent, 4-month sleep regression lingers for around two weeks.
What causes 4-month sleep regression?
Since most parents want to avoid any interruption in the much-needed good night's sleep in the household, it's important to understand why this sleep regression happens in the first place to babies happily sleeping through the night. As infants, babies don't have a sleep and a wake cycle. They pretty much sleep when they want and wake when they're hungry or need a diaper change. When babies reach the 4-month mark, they begin to understand the sleep/wake cycle. They snooze longer at night and take fewer naps during the daytime. It's this important developmental adjustment that can actually interrupt their newfound sleep pattern.

Read more