Board Thread:Show-Related Questions and Answers/@comment-28162607-20180206161754/@comment-26967699-20180207014118

Well, Roland was 4 years old during the group's Neverland mission, which also takes place in 2012. So he must have born in 1980 (excluding the Dark Curse). And we saw Marian after she gave birth to Roland, in "Snow Drifts"/"Snow Falls". So approximately, there are 3 years gap between Snowing's meeting and the casting of the Dark Curse. But note that it can also mean 2 years and a couple of months. But yeah, it can't be more than 3 years.