Well, carnival is a thing.. or maybe some scarred blood-dripping version on Halloween? I don't know how much our Polish neighbours care about such 'traditions', especially regarding the fact that 'Halloween' just arrived in Europe again from the USA after WWII. And carnival is celebrated in Germany, so I don't know if and how our neighbours do it.
Halloween slowly gets some ground, but many people still mock the idea of such a 'tradition'. For example, if you were to knock on someone's door saying "Trick or treat!", you'd be considered crazy, and I don't think anyone keeps sweets at home for that reason. Besides, I never understood why in America people often dress up in random costumes which are not scary at all... isn't this what carnival is for?
As carnival is concerned... if you've finished grade three of primary school, you probably won't even notice it. Which is kinda pity.