With about 2.3 children per household worldwide, he has to visit roughly 300 million households.
Spreading those households evenly across 69 million square kilometres of habitable land area on Earth (taking oceans, deserts, Antarctica and mountains into account), Father Christmas has to travel 144 million kilometres on Christmas Eve. That’s nearly the same as the distance from Earth to the Sun.
Everyone assumes he travels distances at FTL speeds.
The simpler solution is obviously inter dimensional time jumping.
The red nose is what guides the wormhole.