I was in the frozen dungeon. I never got any warning at all until I read the post here. That's disappointing. I was a little under halfway into it.
It doesn't seem like a good idea to create an 8-hour dungeon with hard to get special keys then make the decision to reset the server 3 hours from the time you decide.

I simply do not want to try to keep up with another source media. Before joining this OFFICIAL forum I have never missed anything that was posted on Twitter. If the game advertisements listed Twitter as the OFFICIAL way to keep up with game news I may have joined, but it is simply a matter of not wanting to or needing to for any other reason.