If you were born in London England at 1:00 AM and your friend in America was born 2 hours after you, their records would show they're a day older than you. This is because they live in a previous time zone that is in the previous day. At 1:00 Am it is still 7 or 8 pm the previous day, even at 3:00 am UK time it is still the evening the previous day in America.
This paradox gets worse if your born on the 1st of January at 1:00 am because your American friend's records would show they're born a different year to you as well.
