Half Birthday Calculator

Find out when your half birthday is! Enter your birth date to discover the exact date 6 months after your birthday. Perfect for an extra celebration!

Birth date

About the Half Birthday Calculator

A half birthday falls exactly 6 months after your birthday. For example, if your birthday is March 10, your half birthday is September 10. It's a fun way to have an extra celebration during the year!

Half birthdays are especially popular for children whose birthdays fall during holidays or summer vacation. Teachers often celebrate half birthdays so no student misses out on a classroom celebration.

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Frequently Asked Questions

What is a half birthday?

A half birthday is exactly 6 months after your birthday. If you were born on January 15, your half birthday is July 15.

How is the half birthday calculated?

We add 6 months to your birth date. If the resulting month has fewer days, we adjust to the last valid day.

Why celebrate a half birthday?

Half birthdays are popular for kids with birthdays near holidays, or for anyone who wants an extra celebration! They're also useful for teachers celebrating summer birthdays during the school year.