Use fomantic calendar

app/assets/javascripts/dunlop-semantic/calendar-vendor.js

@@ -7,6 +7,7 @@
  * http://opensource.org/licenses/MIT
  */
 
+debugger;
 ;
 (function ($, window, document, undefined) {
 

app/assets/javascripts/dunlop-semantic/calendar.coffee

@@ -1,15 +1,18 @@
-#= require ./calendar-vendor
+# require ./calendar-vendor
 Dunlop.register_setup 'calendar', (target) ->
-  target.find('.datepicker').calendar
-    firstDayOfWeek: 1
-    type: 'date'
-    formatter:
-      date: (date, settings) ->
-        return '' unless date
-        moment(date).format().substr(0, 10)
-      datetime: (date, settings) ->
-        return '' unless date
-        moment(date).format().substr(0, 10)
+  target.find('.datepicker').each ->
+    options =
+      firstDayOfWeek: 1
+      type: 'date'
+      formatter:
+        date: (date, settings) ->
+          return '' unless date
+          moment(date).format().substr(0, 10)
+        datetime: (date, settings) ->
+          return '' unless date
+          moment(date).format().substr(0, 10)
+    options.showWeekNumbers = true if $(@).data().hasOwnProperty('showWeekNumbers')
+    $(@).calendar options
 
   target.find('.timepicker').calendar
     ampm: false