I remember back when I played runescape, they always had these really interactive holiday events. And players would be squirming all around trying to find where it was. After you would complete it (it was like a mini-quest), you would be rewarded with some kind of item. I thought it was really cool, but if you missed the event you'd be pooped out. And now days, I play simpler games, such as parallel kingdom, and they just have boring items that you can buy for holidays.
Is it worth making holiday events, or could you get by without them?