Why is Halloween on Oct. 31 With the Celts celebrating a Nov. 1 new year, it made sense to celebrate Oct. 31. Pope Gregory III designated Nov. 1 as a time to honor saints, hence All Saints When is Halloween? Halloween is always marked on 31 October - the eve of the Christian feast of All Saints' (or All Hallows') Day - which this year means it will be observed on a Saturday. When is Halloween 2021? Halloween is always marked on 31 October - the eve of the Christian feast of All Saints' (or All Hallows') Day - which this year means it will be observed on a Sunday. Happy Halloween! Today, Oct. 31st, is Halloween, the spooky time when ghosts and goblins of all ages dress up in hopes of securing candy. All the sugar-laced fun comes at a cost. Why Halloween Is Always Celebrated On October 31 Because, Ghosts. The celebration always took place at the end of October to honor the end of the harvest, and the start All Saints' Day. In the eighth century, Pope Gregory III declared Nov. 1 as All Saints' Day. This was a time to pay Thank The Halloween takes place on Oct. 31 regardless of the day of the week. In 2023, Halloween is on a Tuesday. According to tradition, children in the United States dress up in costumes and go door-to-door in their neighborhoods saying "trick or treat" to receive candy. Christian origins and historic customs Halloween is thought to have influences from Christian beliefs and practices. [47] [48] The English word 'Halloween' comes from "All Hallows' Eve", being the evening before the Christian holy days of All Hallows' Day (All Saints' Day) on 1 November and All Souls' Day on 2 November. [49] The evening before October 31, is known as All Hallows' Eve—or, more commonly, Halloween! If All Saints brings out winter, St. Martin brings out Indian summer. How We Celebrate Halloween. Many of the customs and practices of Halloween are innocent fun, though some deal with reminders of death and concepts of good and evil. 0VLcy.