It's a really great addon! Thank you for maintaining it. If I may, tho, a suggestion...

Before one of the recent updates, the "Events" tab would show all the holiday achievements still in the game, like Darkmoon Faire or Brewfest, etc., at all times.

Now, it hides them if the event is inactive or the option "Not Obtainable" is not checked.

On the other hand, checking that option shows all the achievements that will actually never be obtainable again as well.

A simple button in the filter list for "Temporary Not Obtainable" would solve this problem. It would show what obtainable event achievements I am missing and have to wait for, but it would not show achievements that I will never be able to get.

Thank you again for all the hard work!

Should be implemented with 72.0