Board Thread:Wiki-Related Discussion/@comment-24304025-20140501134957/@comment-1894786-20140503225212

I'd put it like this:

Pre-Dark Curse (EF flashbacks)

Dark Curse (Season 1)

Post-Dark Curse (Season 2 + Season 3a)

Post-Pan's Curse (Between 3a and 3b)

Snow's Curse (3b)