What is a Half Birthday?
A half birthday is celebrated exactly halfway between your full birthdays. For example, if you were born on January 1, your half birthday would be on June 1.
How to Use This Calculator
- Enter your birthdate in the date picker field
- Click the "Calculate" button to see when your next half birthday is
- The calculator will also show your next 5 upcoming half birthdays
Calculation Method
The calculator uses the following logic:
The half birthday is calculated by:
- Starting from your birthdate
- Adding approximately 1.5 years (365.25 days)
- Adjusting if the half birthday has already occurred in the current year
For example, if your birthdate is January 1:
- First half birthday: June 1 of the same year
- Second half birthday: June 1 of the year following your first birthday
- And so on...
Practical Uses
This calculator can be used for:
- Planning special celebrations halfway between full birthdays
- Tracking upcoming half birthdays for family members
- Understanding the concept of half birthdays