Board Thread:Questions and Answers/@comment-27449779-20151222131224/@comment-8986886-20151227144736

Soul reaper wrote: All we really know regarding the timeline of these events is that Rukia was adopted into the Kuchiki clan 40 years before the start of the series, while she was still in the academy.

Where is this stated? Since you know this for a fact, and not just through hearsay, would you mind sharing your source?