Counting backwards, that puts the most popular date of conception around November-December — a nice time to snuggle up together under the covers as the temperatures drop outside.
A less scientific metric is the sheer volume of famous people born on this date.
Four-time Oscar nominee Michelle Williams (1980) and three-time Razzie winner Adam Sandler (1966) share the birthday.
So do British actor Hugh Grant (1960), American actor and comedian Bill Murray (1950), "Modern Family" actor Eric Stonestreet (1951) and Canadian crooner Michael Bublé (1975).
There are enough sports figures to fill an All-Star-caliber birthday party.
Among them, Cleveland Cavaliers star J.R. Smith (1985) and Super Bowl-winning quarterback Joe Theismann (1949) were born on Sept. 9.
Legendary Russian author Leo Tolstoy (1828) and the late, great “(Sittin’ on) The Dock of the Bay” singer Otis Redding (1941) were also born on the esteemed date.
And the real secret recipe behind Kentucky Fried Chicken? Whatever aphrodisiac Colonel Sanders’ father fed to his mother nine months before September 9, 1890, when KFC founder Harland Sanders was born.
Sept. 9 astrological sign
People born on Sept. 9 have the astrological sun sign of Virgo, just like Beyoncé, whose Sept. 4 birthday puts her once again ahead of the trend.
Typical traits of Virgos include attention to details, a patient attitude and a gentle spirit. The ability to share their birthday is a plus!
This story was originally published on Sept. 9, 2017, and has been updated.
Babies celebrating a birthday. The most common birthday in the United States, according to data collected over two decades, is September 9. That's right, it's the real labor day!
The most popular day in the U.S. for birthdays is Sept. 9, where on average 12,301 babies were born. The least popular day for births is Jan. 1, with 7,792 babies born.
This birth rate in September is likely affected by the increased level of sexual activity over holiday periods nine months before September, but is also due to seasonal changes in human fertility that reflect changes in temperature and weather.
After analyzing birth data, researchers have found that September 9th emerges as one of the most common birthdays in the United States. This intriguing finding suggests a higher number of births around this date than any other time of the year.
On this day, Washington, D.C. was named the capital of the United States, California was admitted the 31st state in the U.S., and Elizabeth II became the longest reigning monarch in the UK's history. Famous birthdays include Adam Sandler, Michelle Williams, and Hugh Grant.
The data comes from the Centers for Disease Control and Prevention and the Social Security Administration. The rarest month to be born in is February, making Aquarius the rarest zodiac sign. February is the shortest month of the year, even with a leap year.
September babies may have long lives ahead of them.
September-ites are more likely to live to 100! Babies born from September to November have a higher chance of hitting the century-mark, perhaps from being protected through the first winter by all the great immunity in breastmilk.
People born in September fall under two zodiac signs: Virgo and Libra. Those born until September 22 come under the Virgo sign and those born later come under the Libra sign. Just like every other month, those born in September have their own unique qualities which makes them different from others.
Number 9 represents the ruling planet Mars and people born on the 9th, 18th, and 27th of any month possess its qualities of ambition, confidence, stamina, and energy. They are down-to-earth and disciplined, but can also be aggressive, stubborn, and speak harshly.
According to data collected over more than 20 years, the most common birthday is September 9, which just so happens to literally be Labor Day, depending on the year. Here's the thing though, the numbers aren't all that dramatically different than most other days.
Despite the fact that September is so heavily represented in the top 10 most common birthdays, there are actually more births reported in August! All but one August birthday made the list of 100 most common birthdays (the exception being August 3, which lands at 116).
1. Adam Sandler. Adam Richard Sandler was born September 9, 1966 in Brooklyn, New York, to Judith (Levine), a teacher at a nursery school, and Stanley Alan Sandler, an electrical engineer.
February 29th: February 29th (Leap Day during Leap Year) is the rarest birthday with only a one in roughly 1,460 chance of being born on this date. ...
The second rarest birthday is Christmas Eve, December 24th.
Other uncommon birthdays include January 1st, December 25th, and January 2nd.
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