when is urf?

Rotating queue will join Classic and ARAM in an upcoming patch, but part of why we’re announcing it now is because two years in a row, we delivered the Ultra Rapid Fire game mode in increasingly absurd ways. While we’re pretty sure you aren’t going to believe us anyway, we’re telling you right now that URF will not return on the first of April. We’re not quite ready to announce the full slate of game modes that’ll feature in the new Rotating queue, but we are ready to share that Ultra Rapid Fire will appear at least twice in 2016.

Right there. Don't believe me?

http://euw.leagueoflegends.com/en/news/game-updates/gameplay/announcing-rotating-game-mode-queue