When did the small holidays become the big ones?

Thanks, Hallmark, for making a bigger deal out of every little holiday.  It’s a minefield to be a parent these days, because if you forget to leave something that the leprechaun would have left, you are screwed.  Your kids know, they remember, and remind you incessantly.  Awesome. So when did this all happen?  Was it … More When did the small holidays become the big ones?