Recently,I have started playing Club Penguin Elite Penguin Force for the Nintendo DS. I set my calendar to October 31, 2012 and when I went to play there was Halloween decorations scattered across the island. If you go into the night club you'd be able to play a game with some mascots. You will have to figure out who is who, you will earn bonus coins for guessing the right person correctly the first time.
If you go back to your settings on your DS and change the date to December 25, 2012 Play Club Penguin Elite Force and you'll notice Christmas decorations scattered across the island. Go to the Town and you'll notice a penguin, Santa Claus in front of the Night Club. Talk to him, he'll then tell you he has a problem and he mixed the gift tags up. Santa will ask you to deliver 4 presents to penguins scattered across the island, it is your job to find and deliver the presents to them. Once you give the right gifts to them, go back and talk to Santa in front of the Night Club. Santa will thank you and give you some bonus coins. You are allowed to play the minigame more than once only in the month of december.
These are the only 2 events on Club Penguin Elite Penguin Force that they celebrate and have minigames for you to play and earn bonus coins.