But not necessarily this year, since the 31st falls on a Sunday this year.
A check of area cities and towns finds eight have decided to celebrate Halloween on Saturday, while only one has decided to stick with Sunday, the 31st.
Those who plan to go door to door are asked to stop only at homes which have porch lights on to welcome them.
Here is the list of times and events for Trick or Treaters:
Alton, Mo., will observe Halloween on Saturday, Oct. 30, from 5-9 p.m.
Ash Flat is also going with Saturday night.
Cherokee Village will observe Halloween on Saturday, from 5-8 p.m. The Cherokee Village Police Department plans to join the fun by handing out treats at police headquarters.
Hardy will observe Halloween on Saturday. Special activities are planned at the Historic Hardy Gym. From 6-9 p.m., there will be a pumpkin patch, haunted house and booths will be set up to make sure visitors get plenty of candy.
Highland will observe Halloween on Sunday, just like the calendar says.
Horseshoe Bend has designated Halloween will take place on Saturday from 5-8 p.m. The city will hold its annual Trunk or Treat festivities at the mall. Citizens will line up to hand out candy from the trunks of their vehicles and there will be special activities for kids inside the mall.
Mammoth Spring will celebrate Halloween with its seventh annual "Spooktacular" on Saturday from 4:30-8:30 p.m.. Main Street will be lined with booths handing out treats and the downtown mini-park will turn into a "haunted park" for the Chamber of Commerce sponsored event.
Salem will welcome Trick or Treaters on Saturday from 5-8 p.m. From 6-8 p.m., Band Boosters will hold their annual fall festival at Salem High with booths, games, and a haunted house.
Thayer, Mo., has also moved Halloween to Saturday from five to eight p.m.
For a safe Halloween, Trick or Treaters are urged to wear light colored costumes, masks that do not restrict vision, carry flashlights and watch for traffic as they cross streets.