title: How to add validation/restrictions for HTML5 date field without jquery/javascript
body: <p>Is it possible to add validations/restrictions to date element using HTML api,without jquery?</p>
  
  <p>I am currently using jquery datePicker to display calendar,and for adding restrictions using the beforeShow method of the datePicker.</p>
  
  <p>Now i am trying to use the HTML5 calender and want to know how to add restrictions(eg:disable weendends/holidays) to the HTML5 calendar.
  Can somebody point me in right direction?</p>