Due to the last minute bids the auction end time is now 4pm CST (5pm forum time). Unless there is another last minute bid then it'll be pushed another 4 hours (8pmCST 9pm forum time).
I would use a GMT, but after midnight tonight it'll get complicated since the province I live in does NOT time change.. That is if the auction even goes that far.
I totally forgot about the forum time being customised.
Just look for the area closest to your home town and that will be the time that coresponds with the 4pm endtime. I'll adjust it if the bids bump the endtime again.
Hope that helps, if its to complicated i'll just jump onto the game and get the server time.