Having grown up in the northern hemisphere I have a particular mental image of Father Christmas/Santa Claus/Saint Nick/whatever. It involves a lot of clothing, topped with a lined robe. Y’know, typical cold weather gear.
In the southern hemisphere, do you get the same? If so, how come the poor guys cosplaying as him don’t overheat?
A different angle might be to ask if X country actually has a concept of Santa Claus for their particular holidays if you’re interested in learning about that.