So, you wanna know the rarest birthdays? It's not just some random guess — there's actual data behind it. Pretty interesting stuff. The seven rarest birthdays? They're basically all the big holidays. Christmas, New Year's, Thanksgiving — you name it. Plus a few other dates where hardly anyone pops out. The CDC (that's the Centers for Disease Control and Prevention) keeps track of birth numbers across decades in the US. And when you look at their data, some dates just barely show up at all. Makes 'em statistically uncommon, y'know? Based on US birth data, these seven dates consistently rank at the bottom: Two big reasons: holidays and just... natural patterns. Hospitals cut back on elective inductions and C-sections around major holidays. So fewer babies get scheduled. Plus, natural birth rates dip around these dates — maybe holiday stress, planning, who knows. Christmas and New Year's are times when families avoid hospitals unless it's an emergency. And Leap Day? That's just calendar trickery. Only comes around every four years, so it's inherently rare. CDC data from 1994 to 2014 shows holiday dates are the least common. The average daily birth count is around 10,000. Check out these numbers — they tell the story. Flip side — most common birthdays are in September. September 9 and 19 are huge. That's because people conceive during winter holidays. The difference is wild — September dates see over 12,000 births per day. Almost double the rarest dates. So if your birthday's in September, you're definitely not alone. Having a rare birthday kinda means you're sharing your day with fewer people. Christmas babies? They get combined gifts sometimes. Or celebrations get overshadowed by holiday stuff. Leap Day babies — "leaplings" — only have an official birthday every four years. That's a weird conversation starter, isn't it? But there's a plus side — these birthdays are less likely to be chosen for elective deliveries. So they feel more natural, maybe. Yeah, absolutely. Because it only exists in leap years — every four years. In non-leap years, the date just doesn't exist. So it's the rarest by default. Hospitals schedule fewer elective births on Christmas Day. Plus, natural birth rates dip because of holiday stress and planning. Makes sense. Sure — January 2, December 23, November 23. But the seven listed here are the most consistently rare according to CDC data. Big time. Different holidays, different cultural practices. In China, Lunar New Year affects birth rates. So the list changes depending on where you look.What is the 7 rarest birthday
Which dates are considered the 7 rarest birthdays?
Why are these birthdays so rare?
What does the data say about the rarest birthdays?
Date
Average Births per Day (1994-2014)
Rank by Rarity
December 25
~6,500
1
January 1
~7,000
2
December 24
~7,500
3
July 4
~8,000
4
November 27 (Thanksgiving)
~8,200
5
December 26
~8,500
6
February 29
~5,000 (in leap years)
7
How does this compare to the most common birthdays?
What are the implications of having a rare birthday?
Frequently Asked Questions
Is February 29 the rarest birthday?
Why is December 25 so rare?
Are there any other rare birthdays not listed?
Does the data vary by country?
Checklist for Understanding Rare Birthdays
Short Summary
