My older twin's birthday is two days after mine!

How can this happen?

One was born after midnight on a leap year?

That may play a part, Koz, but will not put the older twin (born first) with the later birthday.

Keep thinking on this one. Should I give the answer if someone doesn't have it by a specific date?

Probably not the answer 'fuse, but sometimes parents who have twins say "here are my twins" when introduced. So a Dad or Mom could have his-her birthday two days before his-her oldest twin.

Not what I'm after, Mozart. There is an answer which makes perfect sense, with a highlighted clue in my last post.

Good luck

In Great Britain (and to-become USA), the Gregorian calendar was adopted in September 1752.
Sweden (and Finland) had a "double" leap year in 1712 - two days were added to February, so that there was a date February 30, 1712.

So the year is 1712. The first twin was born "England time" Then the second twin was born in Sweden "Sweden time" source.(something like that)

Therefore the oldest may say he was born on the third of March while being in England, and the youngest may say he was born March first while being born on the same day in Sweden.( probably travelling on a boat from England to Sweden)

This message has been edited. Last edited by: Mozart56,

Wow! Amazing research for that one. Extra credit points, for certain.

While that may have been possible, I am looking for something that could happen with our current calendar system.

Could the twins have been born on an airplane one before and after midnight, while also crossing the international dateline?

Sailracer and Koz together have the dual keys to this puzzle.

And the answer is...?

On a leap year, on a plane flying towards West at about 12:00am or so ( you can play with an hour here)the oldest twin is born on the new day,March first.While it is still Feb.28 for an hour (11 pm or about)not too far away due to International time zone,the plane catches up and the second twin is born?

Good enough!

All that is required is that the first twin is born on March 1, and the other is born on February 28 after crossing the international date line.

The birthdays will be two days apart every leap year.