United States' Rarest Birthdays 

Birthday greetings to you and you! Wait, how many people share this birthday?

The answer may shock you. After the "birthday paradox," 50% of 23 people in a random group will share a birthday.  

That applies whether they have an uncommon birthdate or the most popular birth month. 

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Which months have the most and fewest birthdays?  

We cover you. We're not ashamed to disclose data on the most popular and rarest birthday dates, unlike gifts. 

Although you may not have the rarest eye color or personality, a rare birthday is worth boasting about. 

February is rare since most infants are conceived in May, when the temperature is warmer and the days are longer. 

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