The raid signup system that we are using atm is the one ingame. So check your ingame calender in the top right corner that has todays date on it. It should also be flashing whenever you get invited to a signup or new raids are added. Very easy to signup that way, just go there to the date and click accept. And just like that your signed for the raid. If you got any problems or cant find the ingame calender check settings > Interface or something to locate and maybe get it back up there if you once before removed it. You might not get a spot even thou you signed, due to what classes we need and who´s leading, do we have enough healers etc etc. Raid usually start at 19:40 on regular days and around 19:00 on the weekends.