Toggle Two Checkboxes With One Click And Without Js

Is there a way to toggle two combined checkboxes with one click? I have a small calander where I want to select weeks with checkboxes. One week can be in two month so I have two ch

Solution 1:

How about only having one checkbox? I mean, there's only one week, although it spans months it isn't two entire weeks! Consider your design, i.e. Week Ending 4/5/2012 is a week ending in May, sure it starts in April but if you're going to put your weeks in a bag, do it by something definitive if you can.