Next Tuesday sees the release of "Revolution", the first piece of DLC for Call of Duty: Black Ops II. To get players in the mood for the incoming content, Treyarch has announced a Double XP weekend that starts tomorrow.
As shown above, the weekend starts at 10AM PST on January 25th and lasts
until 10AM PST on January 28th. This gives players 72 hours to gather
XP.