Giving out Halloween candy to trick-or-treaters or at Halloween parties is a longstanding tradition in the US. Children often bring home loads of treats, including miniature candy bars, gum and candy corn.
Stores stock up on extra candy at the beginning of October. Customers buy it then, eat it, and by the time Halloween comes around (October 31), they have to buy more Halloween candy.
Halloween Candy Background and History
The history of trick or treating hails back to the European custom of souling. Beggars would beg treats in exchange for saying prayers for the giver's dead relatives.http://www.jeremiahproject.com/culture/halloween.html Trick or treating brought the need for treats, and that brings us back to Halloween candy!
Halloween Candy Scare
Since the early 1980s, reports have surfaced of poison-laced or razor blade-laden candy. Some parents around the US have subsequently required that their children throw out any of their trick-or-treating yield that is not factory-sealed. Hospital x-ray departments began offering free services on and after Halloween, in order to check for harmful objects embedded in candy. Though these concerns and practices remain common, some of the original reports of tampering have been debunked as urban myths.Snopes.com: Pins and Needles