From Friday, July 5, 15:00 CEST until Monday, July 8, 15:00 CEST, all players will receive a 15% bonus to skill gain and a 15% higher chance to gain affinities. In addition to that, all players with an already active premium account at the start of the event will receive 3 additional days of premium time for free.
On Tuesday, July 9, all players will receive 5 hours of sleep bonus around the time of the weekly maintenance restart.
Click this link to learn more about the event details and some background info about the last big update launch.