Most people celebrate their birthday on the same calendar date every year. However, due to leap years, the exact count of days since you were born won’t always match that date. If you count your age in strict 365-day increments—your “real birthdays”—they can drift away from your original date. This tool shows both your next calendar-based birthday and your next “real birthday.”
See how your calendar birthday and real birthday dates compare over the years.
| Age | Calendar Birthday | Real Birthday (365-day increments) |
|---|