I totally agree with @mazingerz88. October 31st is what Hallowe’en is: the eve (“e’en”) of All Hallows, which are November 1st and 2nd, All Saints’ Day and All Souls’ Day, respectively—the “hallows” (holy days). Hallowe’en is the night before—the eve. (That apostrophe is mostly lost now, but it still has a meaning.)
It’s not the property or domain of any “officials” to move it or change it. They have more of a right to say the Fourth of July isn’t going to be on the fourth than they have to alter October 31st.
I will answer my door with candy on October 31st and not on any other day. If “they” move it, then it’s lights out at my house.
I also predict that an attempt to assert local authority over this tradition and change it will have the effect of killing it off. It’s one of the few social customs we have that are not overtly religious (despite its origins). I think that’s why Halloween and St. Valentine’s Day get such heavy play in schools and in retail. They’re relatively safe because they don’t seem to offend anyone’s ethnic or religious sensitivities, despite the efforts of some to make an issue.