It's that time of year again, when Santa and his reindeer set off to bring gifts to all the boys and girls in the world.
But how does he do it?
Well to find out, Morning Ireland reporter Cian McCormack embarked on a special investigation, involving experts in physics and meteorology, to determine how the big man is able to pull off this annual phenomenon - and he even got to chat to Santa himself.
Listen to Cian's exclusive report here
Meanwhile, Aisling Kenny spoke to the young and old about their ideas of Christmas, past and present.
Click here to hear Aisling's special report