February 29 birthdays are rare but not complicated
A person born on February 29 has a real birthday every year, but the calendar date appears only in leap years. In non-leap years, families and organizations may recognize the birthday on February 28 or March 1 depending on custom or rule.
For everyday age calculation, the person still gets one year older each year. The practical question is which date counts in a non-leap year for a specific purpose. Socially, that is personal preference. Officially, it depends on the rule being applied.
How to handle leap-day age questions
Use the calculator for general date math, then check the specific rule if the answer affects eligibility. Some systems treat February 28 as the effective date in non-leap years; others may use March 1. Never assume when the result matters.
A leap-day birthday does not mean someone ages only once every four years. It means their exact calendar birthday appears every four years.
Celebrate on February 28, March 1, or both — it is a personal choice.
Check the source that controls the requirement.
Related tools and guides
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