I've long been frustrated that when I compare dates when using Google Analytics that there is not a feature or option to compare the days of the week.
For Example If I were to compare March 10 of 2009 with March 10 of 2010, the numbers are off by a day. Why? because March 10th of 2009 was a Tuesday and march 10th of 2010 was a Wednesday and this really throws the ALL the numbers and percentages off.
There doesn't appear to be a way to stagger the dates or offset the dates so I can match up the days of the week and compare those numbers.
Anyone have any ideas?