While an unlimited amount of double XP days can be purchased, only one double XP day can be activated at a time.
Once you decide which day(s) you would like, click "Activate XP Day". You will notice a timer displaying in blue that will inform you of how much time you have left for double XP. All days will be a full 24 hours.
Double XP Issues
Q: I am not receiving my Double XP
A: Please make sure you have activated your Double XP Day. All Double XP Days are held in reserve until you activate them. If your day is activate then you can rest assured that your Double XP is being added to your account.
Q: GameBattles is having Double XP, why should I activate a Double XP Day?
A: XP Stacks, You will earn Triple XP by activating a Double XP Day during Double XP.