It means we know what Sir Elton was doing on HIS birthday (March 25)!
Seriously, no. Remember that the date for Christmas was chosen by the Roman Catholic Church many centuries after the fact, and was chosen because it coincided with a pagan feast (many church feasts took pagan holidays and "Christianized" them). There's no more coincidence with Sir Elton's baby being born on December 25th than Jimmy Buffett or Barbara Mandrell being born on Christmas day.
You can help the HubPages community highlight top quality content by ranking this answer up or down.