Santa is everywhere at once and essentially unobservable. This sounds less like a classical physics problem and more of a quantum mechanics problem.
(
evil_andy Stick stick stick stick sticky sticky stick stick, Sun 23 Dec 2018, 19:43,
Reply)
Perhaps he's going so fast round the world that time goes backwards, like what Reeveman once did.
(, Sun 23 Dec 2018, 23:44, Reply)