This Halloween infographics thumb timeline template combines interesting facts, numbers, and statistics. The template is completely editable. Colors, text, and icons can all be easily changed. Halloween hasn't always been about dressing up as your favorite movie character, trick-or-treating, and stockpiling candy. Every year on October 31, people celebrate Halloween. This custom originated in the ancient Celts' late summer festival when people would light bonfires and wear special clothing to ward off ghosts. It is also said to be when the veil between the living and the dead is thinnest, allowing humans to communicate with those who have passed on.