Okay, I know some do and some don't for those who do or just wish to learn something, check out these sites:
Halloween - videos on: Bet you didn't know: Halloween, Bet you didn't know: Witches, All about the pumpkin, History of Halloween, Halloween around the world, History of the Jack O' Lantern, Pumpkin facts, The Halloween pumpkin: An American History, Halloween by the numbers (Yikes, that's a lot of candy!), Halloween photo gallery, History of Ghost Stories, and Ghosts in the White House.
From The American Folklife Center - The Library of Congress: Halloween: The fantasy and folklore of all Hallows, by Jack Santino, September 1982; updated 2009
Reference: History of Halloween, by Benjamin Radford, Live Science Contributor, 10-22-14