What Is The Most Common Birthday?

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What is the most common birthday?

The most prevalent birthday is September 9. The second and third place finishers are September 19 and 12.

In fact, the whole top ten list is made up of September birthdays between September 9 and September 20.


Count backward and you'll be just in time for the holidays, because pregnancy lasts 40 weeks on average from the last menstruation.

Most Common Birth Month!

Though September is the most common month for birthdays, August is the most common birth month.

How Many Birthdays?

Between 1994 and 2014, there were just about 7,600,000 births in August, according to birth data.

Following Months!

July is the second most common birth month with 7,500,795 births, followed by September with 7,411,299 births.


The months of July and August each have 31 days, whereas September only has 30. February, with only 28 days, is unsurprisingly the month in which less people are born.

Least Birthday?

Leap day, or February 29, has the fewest number of births. Since the day only happens once every four years,

According to a National Bureau of Economic Research working paper, there are 18% fewer births on holidays and immediately following them.

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