Every week we release a different timed event island. They aren't related to the expedition islands where you follow the main storyline. Timed event islands have their own story and they are festive events in Adventure Bay's world.
Timed event islands are active for a limited time (approximately for a week) and you can play the event island within this time. You can see the timer on the upper right side of the event tasks window. The aim of the event is to collect different event tokens by doing all the tasks one by one and once you complete all the tasks you will win a valuable prize.