Do our birthdays change every 4 years?

Answer 1

Whenever you are born, you will have a birthday every year, even if you are born in a Leap Year. All the normal dates are in a Leap Year. So it is only if you are born on the 29th of February that there may be an issue. People born on the 29th of February celebrate their birthdays on the 28th of February or the 1st of March in other years, whichever they choose.

Answer 2

My neighbor was born on February 29th. So technically, you only have a birthday every 4 years. But you can celebrate your birthday on March 1st. Or February 28th. This same notion (a birthday every four years) is a plot element in the operetta "The Pirates of Penzance" where a contract specifically states "21st birthday" instead of "21 years old."

Answer 3

YEP!!!!!

Answer:

Not quite - most people think that there's only one rule for every 4th year. This would work if the year were exactly 365.25 days long, but it's really 365.2422 days long. This requires a bit finer detail on what is a leap year. Specifically:

1. Every year that is evenly divisible by four is a leap year
2. of those years, if it can be evenly divided by 100, it is NOT a leap year, unless
3. the year is evenly divisible by 400. Then it is a leap year.

So 2004 was a leap year, and 2000 was leap year even though it is divisable by 100 (which would make it not a leap year) because it is divisible by 400 (which lets it remain a leap year.

Similarly 1904 was aleap year (divisible by 4) and 1900 was not a leap year because is tis divisible by 4 and by 100 but not 400.
Not quite. A leap year is a year where the year number is evenly divisible by 4, except that century years (2100, 2200, etc.) that are evenly divisible by 100 are not leap years unless they are also evenly divisible by 400. So, for example, 1992, 1996, 2000, 2004 are leap years, and so are 2092, 2096, and 2104, but not 2100. This happens because the tropical (Earth's orbital period around the Sun) year is not quite exactly 365.25 days, it is slightly less, by about 3 days in 400 years.

Answer 4

No they don't. For people born on leap day, once in every four years they celebrate their birthdays on the 29th of February, which does not occur in other years. In those years, some celebrate them on the 28th of February and others on the 1st of March. Nobody else changes their birthday and there is no reason why they should do.