The Battlefield 4 Battlelog has word that the Battlefield 4 summer update is now live, which includes the new Night Operations DLC as a free release for the military shooter sequel. Here's a Battlefield 4 Night Operations cinematic trailer and here's word on the release:

It’s time to turn out the lights. The Battlefield™ 4 Summer Update is now rolling out worldwide for all platforms today, September 1st, 2015. Battlefield 4 Night Operations, a free* DLC release for all Battlefield 4 players, is also rolling out today in most territories (with PS3/PS4 in Europe coming on September 8).

Check out the Summer Update notes here!

Night Operations includes Zavod: Graveyard Shift, the first map for Battlefield 4 that takes place entirely at night. As you might expect, this changes things up – instead of being able to rely on your eyes, you’re going to need to listen closely, and focus on tools like night scopes and your radar to survive. We put together a tactical strategy guide with some tips for players looking for that competitive edge.

Ready to try out the Graveyard Shift? It supports Conquest, Rush, Obliteration, Team Death Match, Domination and Gun Master, so head out and make your enemies afraid of the dark.