Quote from MolsterQuote from AshyiaMini event regarding Anniversary? Please do count me interested! Altough It is gained at the end of Act IV which is end of the game... does it last even if leaving the game? or does it give so much that it is worth doing izual and rest of Act IV? or perhaps we need more datamined information to decide... so many questions! getting excited
there is no event. Then string above it is just a change to an achievment. Ill make it more clear with an edit
For me anniversary buff can be considered as event. Also, the edit clarified it by a ton.