That's how the enemy comes into the picture. "It's only this, it won't really matter, it doesn't mean anything."
In our sunday school they are. Anytime a pagan day is coming up and society will be infiltrated with the enemy on display in every shop window and essentially everywhere they turn, the church takes steps to educate their youth on what the meaning is and how it should be responded too. If the parents are christians, they should make it their business to know the origins of that day and attempt to follow Christ instead, their children are only going to follow their example. Further still, if their school or parents don't care enough to teach them about the true meaning of that day, it doesn't justify them following it.