Where can we chek event's schedule

Hi ya’ll i never realy know when is event idk how other pple chek it or from where but the only think I know is that atlantis is every last thursday of the month i think
I want to know when is next vallhala?

2 posts were merged into an existing topic: 2020 DECEMBER Calendar (Events, Trials, Rare Quests, Ninja Tower, Masquerade, Atlantis, Valhalla, & Santa’s Challenge) Tentative