Half Birthday Calculator
Your half birthday happens not six months after your actual birthday, but half a year after your actual birthday. This complicates the calculation of a half birthday. This calculator does all the messy math for you. Enter the month and date of your birth and the year that you want to know about. We'll show you when you should ask for half a cake or have half of a party.
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Enter your birth month and date, and the year you want to know about and hit the Calculate button:
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How does it work?
The number of days in the year that you enter is divided by two and rounded up to the next whole day. Those days are added to the month and date that you enter for a number of days offset from the date entered. This offset is turned into a date and that is what is displayed.
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