The new expansion, aside from adding a new planet and faction story line, will be increasing the level cap to 55. These double XP events begin ”mid-March and continue through early April.”
BioWare to run "double XP weekends" over the weekend
15 March 2013 | By Simon Priest
In the run up to the release of Star Wars: The Old Republic’s first expansion, The Rise of the Hutts, BioWare will be running double XP weekends to help users get characters up to level 50 that bit faster.