If you're CDT you're 5 hours behind UST and if you're CST you're 6 hours behind UTC. But... we here in the UK are now in BST (British Summer Time) so we're +1 hour on that. So you are currently 6 hours behind us (I think they both change on the same day so you should ALWAYS be 6 hours behind). So you're 2PM when we are 8PM.
So see you on the 17th!
About time they ditched this changing times I think. It's more annoying than anything...
[EDIT] 8PM Fridays doesn't have to be the ONLY time/day, btw. I/someone else can always arrange other chat times/days on top of this one.