I assumed that all presents had to be delivered at some point on Dec. 25th, local time. I did not take daylight/darkness into account, since he would have such a short time in any given house that you wouldn't be able to see him anyway.
There are only two hard things in computer science: cache invalidation, naming things, and off-by-one errors
posted 8 years ago
You mean after 2000000000 chimneys Santa will be so black with soot nobody will be able to see him? In that case, 48 hours.