Many of the customs we now associate with Halloween are also derived from ancient celebrations.
For example, the current custom of going door-to-door to collect treats actually started in Ireland hundreds of years ago. Groups of farmers would go door-to-door collecting food and materials for a village feast and bonfire. Those who gave were promised prosperity; those who did not received threats of bad luck. When an influx of Irish Catholic immigrants came to the United States in the 1800s, the custom of trick-or-treating came with them.
Does your family carve a pumpkin to place on your porch for Halloween? If so, then you can once again thank the Irish for the tradition. Actually, the custom began with a turnip. People would hollow out the turnips and place lighted candles inside to scare off the evil spirits. When the Irish came to America, they discovered the pumpkin as a larger substitute for the turnip. And so, we now carve pumpkins instead of turnips for Halloween.