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What are the odds of sharing a birthday with someone?
One person has a 1/365 chance of meeting someone with the same birthday. Two people have a 1/183 chance of meeting someone with the same birthday. But! Those two people might also have the same birthday, right, so you have to add odds of 1/365 for that.
How common is each birthday?
How common of a birth date is each day in the calendar year?
| Birth Date | Popularity | Average Births |
|---|---|---|
| 1/1 | 365th | 7,792 |
| 1/2 | 362nd | 9,307 |
| 1/3 | 306th | 10,813 |
| 1/4 | 209th | 11,019 |
What is the most common birthday and why?
According to real birth data compiled from 20 years of American births, mid-September is the most birthday-packed time of the year, with September 9th being the most popular day to be born in America, followed closely by September 19th.
What is it called when you share a birthday with someone?
However, it is usual in the English-speaking world to call people who share the same birthday as “birthday twins.” Less frequently “Irish twins,” especially in the sense of same day and month but one year apart. Also found is “birthday buddy” (via Urban Dictionary).
Is there a day with no birthdays?
December 6th is a special day at Who2: it’s the only day of the year on which nobody in our database was born. That’s 2843 famous people (and counting) and none of them born on December 6th.
Which month babies are intelligent?
Those born in September are, apparently, the smartest out of the entire year. According to Marie Claire, a study published in the National Bureau of Economic Research found that there’s a clear correlation between the month during which you were born and how smart you are.