title: Disabling weekend and national Holidays in ajax calendar extender control
body: <p>I have been trying to use an ajax CalenderExtender for my application. </p>
  
  <p>I have many small operations in my app like adding duration to start date of a task to find the finish date, change duration of a task if its end date is changed (depending on its start date),etc. </p>
  
  <p>But while I do all these operations I want to skip all the holidays and saturday , sundays from the calculations for eg. a task starting on 01/23/2014 with a duration of 5 days should finish on 01/29/2014 (adding 2 days for sat n sun in duration) instead of 01/27/2014. Same should be performed on other operations as well.</p>
  
  <p>Is there a way to do this?</p>