User blog comment:Drache Mace/Time Leap?/@comment-3146930-20140105192728

It really isn't that hard to figure out. The time-skip happened after the episode where Weiss agrees to be a better teammate (The Badge and the Burden, pt 2); but before the fight that Jaune and Cardin had (Jaunedice). If you listen in that episode after the fight, Glynda tells Jaune that it has been weeks, but he hasn't improved at all in that time. She also mentions that students from other school will be arriving soon for the festival, which started to happen in The Stray (second to last episode). Anyway going by this, the time skip was probably only 2 or 3 months.