I'm currently using a 1.9.2 widget on my store.

2. 
   
3. {{ 'http://code.jquery.com/ui/1.9.2/themes/base/jquery-ui.css' | stylesheet_tag }}
4. {{ '//ajax.googleapis.com/ajax/libs/jqueryui/1.9.2/jquery-ui.min.js' | script_tag }}
5. 
   
6. <div style="width:300px; clear:both;">
7.   <p>
8.     <label for="date">Pick a delivery date at least 3 weeks ahead your arrival:</label>
9.     <input id="date" type="text" name="attributes[date]" value="{{ cart.attributes.date }}"class="required"/>
10.   </p>
11. </div>
12. 
    
13. <script>
14. jQuery(function() {
15.   jQuery("#date").datepicker( { 
16.     minDate: +15, 
17.     maxDate: "+2M"
18.   } );
19. });
20. </script>

And I need to unable choosing a specific date on the widget, I don't want my customers to choose all Mondays. 

How can we set this up?

Best regards,

Fabien.