December 2016
We will be performing maintenance on Battlefield 1 on all platforms and regions as we release the Giant’s Shadow DLC to all players. Battlefield 1 multiplayer will be offline for 1 hour per platform, as noted by platform specific timing below:
Thank you for your patience and we’ll see you on the battlefield!
The Teams at EA/DICE
Source: https://forums.battlefield.com/en-us/discussion/74458/battlefield-1-maintenance-12202016#latest
May 2017
I totally forgot about this.