Enter your birth date:

Select a birth date to find out when the next half birthday is and a bunch of other fun information.

When is your half birthday? A "Half Birthday" is not necessarily a birthday plus 6 months. It gets messy because of leap years and the fact that months don't all have the same number of days in them. Just enter a birthday and we'll do the messy calculations. We'll also tell you how long ago the birthday was and how long you have to plan your next half birthday celebration. Have fun!

Click/touch here to see how how we do it and more fun facts in our FAQ.