Calculate your birthdays

A birthday is meant to be celebrated the moment that you are one year (365 days) old. But a year is actually a bit longer than 365 days; an astronomical year (the earth completing one trip around the sun) is about 365.25 days long. That’s the reason we they have invented leap years.
Happy Birthday
This also means that you should celebrate your first birthday at 365.25 days after you are born. And your second birthday at 730.5 days. Depending on what time you were born, this could be on another date than the date you were born. Let’s calculate when should you celebrate your birthdays.

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