Halloween is more Irish than St. Patrick's Day.
Halloween’s origins come from a Celtic festival for the dead called “Samhain.” Celts believed the ghosts of the dead roamed Earth on this holiday, so people would dress in costumes and leave “treats” out on their front doors to appease the roaming spirits. Granted, the Celts were not solely based in Ireland when these customs started taking shape around the first century B.C., but as will be talked about more in a later section, the Irish Celts were the ones who invented the jack-o’-lantern. This Halloween prototype was eventually disrupted and adapted by Christian missionaries into celebrations closer to what we celebrate today, including partly by the not-Irish St. Patrick, whose work was later mostly recognized by Americans.