Bungie firstly confirmed that servers for the game will offline on Tuesday, the 5th of December, expectedly from 7 AM to 10 AM PST.
In another tweet, Bungie confirmed that both the update and the DLC will be available for download on the 5th of December at 8 Am PST, and that the DLC and the game will become playable once the server maintenance is finished.
In light of that, the studio recently took to Twitter to confirm a few details about these future updates with fans.
The Update, by the way, is going to introduce pretty important improvements and fixes as well, such as masterwork weapons and vendor fixes.