That's a trick for sure, because there is no treat to be found in El Salvador.
I am personally a halloween fanatic;however, El Savador does not deliver on halloween. I would just like to actually note the culture seems to lack in all "Horror" aspects. Costumes aren't particularly common, horror scenes, etc. I don't see any horror/fun houses as common ground either.
So Oct. 31 is just another normal day in El Salvador.
Sorry halloween fans. :-(