To celebrate the launch of Nemesis DLC and to celebrate the upcoming Advanced Warfare MP reveal, Infinity Ward and Treyarch are doing something special.
For Call of Duty: Ghosts, Infinity Ward will be turning on Double XP, Double Extinction XP, and Strikezone 24/7 playlist.
For Black Ops 2, Treyarch will be turning on Double XP, Double Weapon XP, and Nuketown 24/7 playlist.
It starts August 8th at 10am PT and will end August 11th at 10am PT.
SOURCE: Call of Duty