WildStar may choose to call its double XP weekend event an X-Plosion, but considering the timing of this particular weekend, we prefer to label it an all-weekend XPmas. You can steal that from us, Carbine. You’re welcome.
Indeed, from December 23rd through the 26th, WildStar will activate its double XP mode. This means that any activity resulting in an XP gain will automatically deliver twice that amount. It even works for level 50 players: Elder gems are gained at a double rate, and once the cap is reached, double gold comes into play for rewards.
Source: WildStar