For my non North American Friends....This is some kind of pagan ritual where small children, quite often accompanied by their parents, roam the streets knocking on strangers doors, dressed in a costume, demanding candy (chocolates and sweets etc), whereupon they then threaten the residents with a "trick" if they don't fill their (large) container with confectioneries.
As someone who did not grow up with "Halloween" and who only experienced this yearly ritual as an adult I quite enjoyed the carving of a vegetable which I then placed a open flame inside and situating this vegetable by the entrance to my house. !!? Weird hu!
To this day I still enjoy this yearly pagan tradition even though my own children are no longer of a suitable age to participate.....still, I like to roam the streets knocking on strangers doors dressed in a costume demanding to be fed.
Either way, enjoy this time of year...