So I was logging off my account, and when I clicked later on my game so I can go back to playing, it said that it needs permisson to get updated, I thought it is a new update since servers were "down" (not really down, because on the site it said it was online), I thought it was a new patch (it happend like day before 9.19), then some strange pre-client appeared downloading something, after it finished I got some client, that I saw on Ocenia, where your Username and Password are on the left side, and it has white background there, also you can stay signed in and sign out from your account.
So I think this might be that 10 year surprise Riot wants to make, because I haven't gone to Ocenia or something else I was on EUNE and got logged off from EUNE, and got logged in in EUNE again with that new client. Even though if it is the surpise, it's not something new, as my friend who played on Ocenia now has that client, and that happend few months ago (That's how I know that's Ocenias client)