make the calendar button align with the date of the page you are currently looking at.
The calendar button should give you the month in which the lessons you are currently looking at were taught. For example, if I am looking at a lesson I taught in March of last year and want to see the previous month's lessons, I should be able to click the calendar button and go forward or back a month from where I am. Right now the calendar button brings up the current month; to move forward or backward in previous years I must click the little blue arrows many times. Very irritating!