User blog comment:Wintermelon43/A set time when everyone comes on chat?/@comment-26531060-20130311110344

To me, it's usually around 4 AM, 11 AM GMT for Mondays, Tuesdays and Thursdays.

5 AM, 9 AM GMT for Wednesdays and Fridays.

And for weekends, it's usually random, though I tend to be on more at about 3 AM GMT.