I upload on Sundays, simply because it's what clicks best with my work schedule. Since I pretty much always have either no buffer or very little, I structure my uploads this way so that I can do the less time-consuming stages during the week after work (pencils/inks) and then sit down and pour more time into the coloring and special effects/etc on the weekend.
I'm interested in trying out some different days for season 2 though especially since I'm planning to draw most or all of it up front before I start posting, I'll have a lot more flexibility with the scheduling (as currently it's hard to post a page on, say, wednesday when it's not even inked yet lmaoo)