Unlike floating holidays such as Easter, Halloween is fixed on October 31; therefore, the day of the week changes each year, and the time for trick-or-treat shifts accordingly (usually starting earlier on weekends)
Traditions and origins
Does the date of Halloween change?
It doesn't change; it's fixed on October 31 every year, with only the day of the week and the specific celebration times varying by location
Key points
PointIt's fixed on October 31
PointThe day of the week varies each year
PointTrick-or-treat often starts earlier on weekends
FAQ
Why is it sometimes celebrated early?
Communities or schools often celebrate early on weekends, but the holiday itself is still October 31