If Valentine's has a similar set up to this Deep Space mini event, then I think we might not get level 60 for a while. This event ends on the fourth, and I reckon we'll get Valentine's Day the evening of the 4th. Which would potentially mean two more weeks without a level update.
I wouldn't mind, but I finished the Deep Space event easily, without much in the way of premiums. It feels like they've stretched a ten day event into two weeks - maybe so it creates the illusion of constant updates while leaving plenty of development time for EA.
Course that's 90% speculation...