Infinity Ward have announced that Infinite Warfare Zombies Double XP is now live. This started Friday night and it ends 10 AM PT Monday 11/14. This is now available for all modes (Public, Custom, and Solo matches) due to the Infinite Warfare version 1.04 patch notes.
— Infinity Ward (@InfinityWard) November 13, 2016
INFINITE WARFARE ZOMBIES DOUBLE XP WEEKEND
— Infinity Ward (@InfinityWard) November 11, 2016
Source: Infinity Ward twitter