Halloween began with the ancient Celtic festival of Samhain, when people lit bonfires and wore costumes to ward off spirits. Over time, it has evolved into a day of activities like trick-or-treating, carving jack-o-lanterns, festive gatherings, donning costumes and eating treats....but how did we get here? Ancient OriginsThe Celts, who lived 2,000 years ago in the area that is now Ireland, the United Kingdom and northern France, celebrated the ancient festival of Samhain on November 1. This…