One of the interesting Christmas traditions is that NORAD (North American Aerospace Defense Command) tracks Santa Claus on Christmas Eve every years. It's something they've been doing since 1955. So how did this start? Turns out it's all because Sears and a typo.
The retail chain put out this infograph explaining the story and how a quick thinking Colonel started a 60 year tradition. You can follow Santa's travels here: http://www.noradsanta.org/