...nah we dont have halloween (not in the same sense your do). Some bars organise a party here and stores do sell some stuff...but its not rly rooted. We do have the day of the dead on the 1st of November where the point is more or less decorating the graves.

As for donuts its sort of related with tradition and thinking you, your animals and the spirits have to be very full on Pust or the harvest thaty year will be bad. Food has to be heavy and rich and I guess a donut fits that. :) So stores takes advantage of that...lol