Board Thread:Show-Related Questions and Answers/@comment-34924658-20150819004304/@comment-260553-20150819194943

The entirety of Season 2 takes place in, at most, a 3-month period in the late winter/early Spring of 2012, with the entirety of Season 3a taking place over the course of a single week (7 days) immediately following on from the conclusion of Season 2. There is then a 1-year time jump between the conclusion of Season 3a and the beginning of Season 3b.

It is revealed in The Tower (episode 3x14) that Emma has not yet celebrated her 30th birthday. If the one-year time jump between Season 3a and Season 3b had in fact taken us into late 2013 as you believe it does, such would not be the case.