Sir Elton John insists on celebrating Christmas (25Dec) a day late to avoid overshadowing his young son Zachary's festive birthday.

The Rocket Man and his partner David Furnish became parents to the little boy on Christmas Day, 2010, but they want to keep the celebrations separate in order to fully dote on the birthday boy.

The singer tells Britain's Hello! magazine, "Christmas and birthdays are always to treasure, and as Zachary's birthday is on Christmas Day, we just celebrate his birthday then and have our Christmas on 26 December."

The couple added to its brood earlier this month (Jan13) when second son Elijah was born via the same surrogate and egg donor as Zachary.