Platform (Browser -Chrome, Firefox etc / Mini client) : Chrome
Server number : S756
Character name : FuuUmon
UID (Facebook account - you can find your UID on the bottom of the Facebook page, Oasis account - go to your profile page and click on your avatar) : 300008959329387

Description of the problem you are experiencing : I can't do the final login for May because it is showing June already even though it is still May

Screenshot of the error page :

Operating system : Windows 7 professional

Screen resolution : 1366 x 768
Your computer time zone and your country : UTC +12, New Zealand
Are you using VPN ? : no