Aaaah! Thanks for shedding light on this topic!!!
We've been spending all day today, celebrating Boxing Day by telling people, "Happy Boxing Day!!!" It's a great conversation-starter, and though I can't speak for the rest of our great nation... also known as "your neighbors to the south," I feel grateful that on this day, I have learned more about Canada.
Before that, I thought that Boxing Day was merely a day that Canadians made up to put on American calendars for the sole purpose of further alienating yourselves from the States, all the while creating this air of exoticism and mystery... sort of like "Memoirs of a Geisha," but for Canadians instead of Asians.