Combining datepicker with jQuery isotope filtering

Combining datepicker with jQuery isotope filtering

I'm trying to combine the jQuery datepicker and isotope plugin to filter out content dependant on date, the calendar filtering works, but I also want a menu to the side of the calendar that will filter for today, this week and this month. The today filter works, but I'm struggling to work out how to filter for 'this week' and 'this month'.
Here's a working fiddle: http://jsfiddle.net/7RRUT/7/ 

I've tried implementing code highlighted in this post, but to no avail, I only need the week and month filters to work now but they're proving to be quite difficult.

I've put click functions in for 'this week' and 'this month', tried and failed to get the week filter working, any suggestions on how this can be achieved will be greatly appreciated!