6th January is of course still Christmas anyway, whven in places where this is celebrated on 25th December - it's the last day of Christmas, and, as such, it's The Feast of the Epiphany, which has the visit of the Wise Men/Magi/Three Kings as the centre piece.

It is a pretty big day anyway, traditionally. It's when children are supposed to get their presents in many European countries. (In Italy they are supposed to be nrought by The Befana - an old lady who missed out on getting along to the First Christams, so she's been making up for it ever since.)