You would think bakeries would be busier in September. Ever wonder why you wish your friends on Facebook a “Happy Birthday” a bit more in September? It turns out that more people are born in September in America. The top ten spots are occupied by September 9, 19, 12, 17, 10, 20, 15, 16, and 18. July 7th is the only single birth month in the top ten.
Globally 9% of the population celebrates their birthdays in August. July, August, and September are the top three months for birthdays in the rest of the world. July 4, December 24, January 1, and December 25 are the least common birthdays.
“Winter is for lovers. Turn the great clock back 40 weeks from September 19 and you’ll find yourself in the December holiday season. As Stiles writes on his blog, “Following a customary gestation period, many of these babies [born on September 9th and 19th] would, in theory, have been conceived on Dec. 17 and 27, respectively.” This makes sense: Many American students and laborers take time off around Christmas, meaning couples have more time for vacation, relaxation, and, yes—baby-making. There is even some data to back this up: Statistically, more couples have sex on vacation.
Fun Fact: 58% of all greeting cards that are purchased in the US are actually birthday cards.