Here in France 6 or 7 years ago, they tried to have people celebrating Halloween, but it didn't work much because it's not a french tradition. It was just commercial. Now, only young people celebrate Halloween, most of the time in primary schools, to get candy or to illustrate the english course.
Anyway let me tell you about a tradition in my area, which I knew when I was a child. In my grandmother's village, close to Germany, there was a night called "witches'night" It took place in the late days of may. During that night, witches and spirits where supposed to visit earth. People curved beet root, put a candle inside and put the roots outside their windows. Village teenagers where playing many tricks during that night. It looked like Halloween in spring, didn't it ?