In the Closers update dropping tonight it appears that the nights are for hunters. Hunter’s Night is the name of the first part of the new season, for example, and it’s also the new town hub that players will unlock. This means new mission dungeons, new endgame dungeons, and of course new gear and improvements to existing equipment. Players will also be able to unlock new costumes along the way, so long as they meet the minimum level of 80 to start accessing the new content.plenty to chew on in the update; the only downside is that you’ll need to wait a little while longer, as maintenance is set to start at midnight EST.
Source: Official Site