I guess it depends on your niche but my best earning days are monday and tuesday. saturdays are the worst.
Must agree with all of you. Working days are all usually very good, but I have a drop for about 30% on Saturdays and Sundays.
Well, It is differ for my two different sites, For the most famous online marketing site , it is Monday, Tuesday and for another shopping related site, it is Saturday & Sunday.
My affiliate sales are higher on weekends even though my traffic is higher during the beginning of the week. Guess people wait to shop on the weekends.
My law site does the best on wednesdays and thursdays. Friday through sunday I get not much at all...
Every day will be a good day for you once you master how to rotate use adsense ad units effectively and blend it with your content and site design