What do you call someone with same birthday?

Most people say "Birthday twins" if they share a birthday with someone. Thus is especially true if they were born in the same year. For example, Abraham Lincoln and Charles Darwin are birthday twins, as they were both born on.

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Then, what months make the best couples?

The results found that March is the month when the majority of happily married couples meet, and November is the month when unhappily married couples are most likely to meet. What is the most common birthday? The most popular birth dates, in order, are September 9, September 19, September 12, September 17, September 10, July 7, September 20, September 15, September 16 and September 18. The experts attribute those dates to couples getting together at Christmas through New Years.

And another question, what is the probability that 3 persons have same birthday?

Then this approximation gives (F(2))365?0.3600, and therefore the probability of three or more people all with the same birthday is approximately 0.6400. Can I marry on my birth month? The studies show that marriages more often occur between people who are born in the same month or a couple months apart-in fact, people generally marry someone whose month of birth is within four months of the own.

Thereof, what's the rarest birthday?

This Is the Least Common Birthday in the U.S. (No, It's Not Leap Day) February 29. July 5. May 26. December 31. April 13. December 23. April 1. November 28.