Birthday Age Calculator

How to Read the Results

The birthday rank is an estimated comparison across the 366 possible calendar birthdays. A lower rank means the birthday is estimated to be more common, while a higher rank means the birthday is estimated to be rarer. Holiday dates, February 29, and the end-of-year period tend to feel more unusual, while several late-summer and early-fall dates tend to score as more common.

For full-date tools, the optional birth year unlocks exact weekday, age, and leap-year math. For month-and-day tools, the calculator still returns zodiac sign, birthstone, birth flower, birthday rank, celebrity matches, and date facts.