About 3 years ago my peak traffic day was Saturday like clockwork and my lowest traffic day was Wednesday. that slowly shifted and Sunday was my peak traffic day, like clockwork. 6 months later my peak traffic day had become Monday. Now it's Tuesday.
I have a hard time believing that Tuesday is the day of the week when most people are on their computers, a more likely scenario is that Tuesday is when I'm ranking best thus getting my biggest share of clicks.
In looking over my traffic charts for the past 3 years each week is like a little saw blade with the peak and low being the exact same distance apart over and over and over. Traffic is up steadily the entire time but the graph pattern is distinctive.
The possible causes that I can think of are...
a) Tuesday really is the busiest time of the week online.
b) Advertisers are more aggressive on the weekends causing more searchers to click the paid ads than a natural link in serps.
c) I'm being throttled of some prime time traffic on typical busy buying days (Friday, weekends etc).
Is Tuesday your busiest traffic day too?