Blizzard announced a 100% XP boost from June 16th to June 24th.
The experience boost will only be for the Americas region and will run from until 11:59 PM PDT in the United States. Based on the wording of the release, this is the "end celebration" for Heroes's launch. While Blizzard will periodically make other releases, we can expect there won't be too many 100% XP boosts. Take advantage of the experience gain and work towards leveling up your heroes!
Full news release here.
?
