A list of the webcomics I read, the times they are officially published, and (the times they most often are actually published)
Amazing Superpowers: Monday, Wednesday, Friday
(sometime mid-morning)
XKCD: Monday, Wednesday, Friday
(between 11 p.m. and 1 a.m. the night before)
Penny Arcade: Monday, Wednesday, Friday
(usually mid-morning, but in the afternoon on occasion)
Oglaf: Sunday
(I can't really tell. Sometimes they even skip a week.)
Wondermark: Tuesday and Friday
(sometime early morning)
Dinosaur Comics: Monday through Friday
(sometime early morning)
Questionable Content: Monday through Friday
(wee hours the night before to early morning on the day of)
Weapon Brown: Once every 4-5 days
(I cannot friggin' tell, Jason Yungbluth is trying to print comics in meat-space and have a life and stuff, and clearly does not focus on providing punctual entertainment for yours truly)
Dr. McNinja: Monday, Wednesday, Friday
(wee hours on Sunday night, then sometime mid-morning Wednesday and Friday)
The Trenches: Tuesday and Thursday
(sometime mid-morning; it hasn't been around quite long enough for me to discern a real pattern)
Bearmageddon: Wednesday and Friday
(around midday; it, too, hasn't been around quite long enough to discern a pattern)