When the Bush administration recently extended daylight saving time in the US by several weeks, it claimed to be doing so for environmental reasons. Of course, not everybody believes this, and some claim it was
due to lobbying by the confectionery industry for more trick-or-treating time on Halloween:
Sweet manufacturers wanted a Daylight Saving Time extension so that the clocks were turned back after Halloween. The extra hour of daylight on 31 October would mean more time when parents could safely let their children go trick or treating, with resulting enhanced sales for the basketfuls of candy traditionally handed out to them.