How rare is
your birthday?
We counted every American born across 21 years of records and ranked all 366 days — from the September stampede to the holiday-season ghosts. Find out where yours lands, then challenge a friend.
tap your day to reveal its rank
Your verdict goes here.
Pick your day in the picker above — or tap any cell on the map, any bar on the rank line, any dot on the dial.
366 days are waiting. One of them is yours.
A year of arrivals, at a glance.
Every cell is one day, colored by how many Americans show up. September burns amber. The holidays fade to deep violet. Hover to inspect, tap to select.
All 366 days, in single file.
Busiest on the left, rarest on the right. Scroll the line, hover to sniff around, and tap any bar to claim it.
Whose birthday is rarer?
Add up to four people. Longest bar means the busiest birthday — the shortest one takes the rarity crown.
Select your birthday up top — you'll auto-join the ring — then add a friend or three.
Which sign owns the nursery?
Average daily births per astrological sign. You are — pick a birthday to find out your sign. Virgo season edges out every other sign, while Capricorn brings up the rear.
Virgo is the most common sign (11,783 average daily births), while Capricorn is the least common (10,554). Late-summer conception peaks push Virgo and the signs around it to the top.
What everyone's checking right now.
The most-looked-up birthdays on this site, updated live as people reveal their ranks. Anonymously counted — no accounts, no tracking beyond a tally.
The board is fresh — reveal a rank and claim the first spot.
The hottest — and the coldest — ten.
Nine of the ten busiest birthdays fall in September. Meanwhile the rarest days are almost all holidays — scheduled deliveries and C-sections simply don't land on them.
average daily U.S. births, 1994–2014
Now ruin a party trick: the odds.
How many people does it take before two of them share a birthday? Fewer than intuition says. Drag the dial and watch the probability collapse the room's uniqueness.
at just 23 people the odds pass 50–50. By 57, it's a 99% near-lock.
September is the busiest birth month — count back 40 weeks and you land in the holiday–New-Year window. January is the quietest: it's short, and February conception math keeps it calm.
Hospitals schedule fewer induced labors and C-sections on holidays. Result: Dec 25, Jan 1, Dec 24 and Jul 4 all sit in the rarest five.
What the data shows
Nine of the ten most common birthdays fall in September, roughly nine months after the December holidays.
Christmas, New Year's Day and the Fourth of July sit at the very bottom — scheduled inductions and C-sections avoid them.
Feb. 29 only exists every four years, so leap-day babies are the rarest club in the calendar even though the daily average looks ordinary.
Popular dates
Dedicated pages for the dates people ask about the most.