O Tempora! O Mores!
Status
Summary
Faced with Umbridge's impending incursion, the Room of Requirement does its upmost to meet the fervent wishes of the DA and ensure that she won't find them - so, very suddenly, Harry and his friends find themselves a very long way from home indeed, with no idea how to get back. This might be a problem... (Group time-travel, with a minimum of bashing.)