10 Least Common Birthdays in the World
Top 10 least common birthdays in the world. Photo: KnowInsiders

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.

10 Least Popular Birthdays

  1. December 25th

  2. January 1st

  3. December 24th

  4. July 4th

  5. January 2nd

  6. December 26th

  7. November 27th

  8. November 23rd

  9. November 25th

  10. October 31st

10 Least Common Birthdays in the World
Photo: Bored Panda

While holidays are a popular time for baby-making, babies are less likely to be born on popular holidays. Christmas, New Year, Christmas Eve, July 4th, Halloween, and some suspiciously Thanksgiving days all make the top 10 least common birthdays.

Matt Stiles at the Daily Viz turned FiveThirtyEight’s data into this color-coded visualization of birthday popularity, denoting the most common birthday dates in a dark purple and the least common birthdays in very pale pink. You can see how common your birthday is by hovering your mouse on the day you were born. It shows you the average number of births that happen on that day, where that date ranks in popularity compared to the other 365 days of the year (the data accounts for February 29’s Leap Day), and the estimated date of conception using the average gestation period of 38 weeks.

The least common birthday date? December 25. Ironically, babies conceived on Christmas Day have one of the top four most common birthday dates (September 17). Christmas isn’t the only holiday few people share a birthday with. In fact, the four least common birthday dates all fall on a holiday.

July 4, December 24, January 1, and December 25 are the least common birthdays, in order of decreasing popularity. Halloween, October 31, is also among the ten least common birthday dates. Late November, around when Thanksgiving usually falls, seems to be an unpopular time to have a baby, as well.

While surprisingly not quite as uncommon as a Christmas birthday or a New Year’s Day birthday, Leap Day birthdays are among the last common birthday dates. As FiveThirtyEight has previously reported, Leap Day babies are less common that you’d expect, even when you account for the fact that February 29 only comes around every four years. By that math, you’d assume there to be about a quarter as many leap day babies as there are babies born on any other day of the year. However, there are actually 7 percent fewer births than that estimation would lead you to believe. As Carl Bialik writes for FiveThirtyEight, this is primarily because there are far fewer cesarean deliveries on February 29. “Who wants a birthday that comes every four years?” Neel Shah, assistant professor of obstetrics and gynecology at Harvard Medical School, said to Bialik in a phone interview.

Friday the 13th is also not a common delivery date. According to another report from FiveThirtyEight, there are actually on average 800 fewer babies born on Friday the 13th than less spooky days of the month. In fact, there are fewer babies born on the 13th day of the month regardless of whether it’s a Friday or not.

>> Top 10 Most Popular Holidays in November Around The World

Least Popular Birth Month

10 Least Common Birthdays in the World
Photo: Cardfields

While September might be choc-a-bloc with multiple babies being born on a daily basis, there is also a least common birth month, where only a bunch of babies tend to share it together. And that, unironically, is the month of December, which could stretch a bit into January and February too.

Why Are They So Uncommon?

Going by the same logic as above, rolling back the clock in December by 40 weeks takes us to April or May. A time of the year where things are hot and unbearable and our bodies biologically go into a relaxing lazy mode, even though we might have summer vacations.

For many people, it also does not make practical sense since conceiving a child around this time brings a baby towards the end of the year, a time of festivities but also a crunch time for working professionals.

Whether your child is born in the month with the most birthdays or is one of those rare children who is born in December, there is barely any difference in how they are born. Right care and great upbringing are the two pillars that always make a child who they are.

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5 Fun Facts About Birthdays

10 Least Common Birthdays in the World
Photo: Mental Floss

1. Origins

Historians believe that the first people to celebrate birthdays were the Romans. On the birthdate of family members, friends, or business contacts, the celebrated were regaled with banquets, gifts, and prayers.

2. Children's birthdays

Today, birthdays are probably most cherished by children, but in centuries past, birthdays were mostly the domain of adults. It wasn’t until the 19th century that children’s birthdays were first widely celebrated. In fact, children’s birthdays were first formally recognized by the Germans, who coined the term kinderfeste, or children’s parties.

3. Milestones

In the 20th century, birthdays were recognized as important rituals in the life of a child. Ostensibly, they help kids adapt to biological and social age-related changes that come with growing.

4. Birthday candles and cakes

The placement of candles on birthday cakes has various potential origins. Ancient Egyptians used candles during coronations, which were held to raise the status of humans to gods. Later, ancient Greeks placed candles on moon-shaped honey cakes made for the goddess Artemis. The Greeks thought that the smoke from blown-out candles lifted prayers and wishes to the tops of Mount Olympus. Another hypothesis as to the origin of birthday candles is rooted in the German practice of placing a candle in the center of bread or cake baked into the likeness of baby Jesus, which symbolized the light of life.

5. From pagan to pious

Early Christians viewed birthday celebrations as pagan in nature. By Medieval times, however, people celebrated the days of saints whom they were named after, a practice that later shifted to celebrating individual birthdates. Celebrations were believed to ward off evil spirits that were attracted to people on their birthdays; friendly visits, good wishes, revelry, and mirth were believed to spook these evil spirits.

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