There is an article on Wikipedia about Passover that gives a very non-traditional (if not anti-traditional) explanation - rather, a series of explanations - for the origin of Y"T Sheni Shel Galuyoth. I find the explanation(s) very weak (and actually offensive). The very next point in the article is about Karaite/Samaritan practice, and it takes a very authoritative stance on the dating of Passover from a Karaite/Samaritan point of view. It seems highly likely that this whole section (or a good portion of it) was written by a Karaite/Samaritan. Can someone please provide all the relevant sources for Y"T Sheni from the Halachic perspective, so that I (or someone else with a similar desire) can update the page? If someone else is a more senior Wikipedia expert (I've written some stubs and made a few edits, but never anything major like this) and would like to take it upon themselves to fix this, please do so. Please also share with the Mi.Yodea community if/when/how you intend to take on this task.
UPDATE - REQUEST: Can someone else with more Wikipedia experience and savvy take the lead on this? Since posting I have had very little time to devote to this, and I would probably need to devote a lot of time to ensure I do it in accordance with Wikipedia's standards.