Half birthday calculator
Find the date exactly six months after your birthday. Add your birth year to see which half birthday you are celebrating.
Your half birthday
Frequently asked questions
What is a half birthday?
A half birthday is the day six months after your birthday, halfway between one birthday and the next. It is popular for people whose real birthday falls on a holiday.
How do I calculate my half birthday?
Add six months to your birthday. If that month is shorter, use its last day. For example, the half birthday for August 31 is February 28 (or 29 in a leap year).
When is the half birthday for December 25?
The half birthday for December 25 is June 25.