Construction has begun for the Holiday Party on Club Penguin Rewritten! All across the island, you’ll find a unique glow to the rooms, along with snow sprinkling down. The main decorations are located at the Forest, where the Advent Calendar will begin offering daily gifts from 14th December.
It’s worth noting that the double coins for drilling at the Cave Mine has now also begun, and that will also last for the duration of the month. You can see this activity described here, but December is probably the best time to drill as it will provide the most coins!
In regards to when the Holiday Party will actually begin, I’m afraid that an exact date hasn’t been revealed yet. However, as soon as one has been, I’ll be sure to let you know!