zett - 5:40 am on Jan 19, 2008 (gmt 0)

Erku,

If yes why? why not on Saturday and Sunday, but Thursday and Friday?

Yes, I've seen that, too.

I believe it has to do with the number of people accessing the web from work. On Thursdays, many office workers realize that they still have plenty of tasks to do ("until Friday"), so they do not access the web. And they leave their office earlier on Fridays.

Then again, on Saturdays and Sundays, they are at home, relaxed, and can really focus on interesting sites.