SO 29179415

HTML

<div ng-app="project">
  <div ng-controller="ListCtrl" >
      <div>
          <input type="date" ng-model="startDate" /> <br/>
          <input type="date" ng-model="endDate" my-directive="startDate"/>
      </div>
      <div>
          {{startDate | json}}
      </div>
  </div>
</div>

CSS

</style> <!-- Ugly Hack due to jsFiddle issue: http://goo.gl/BUfGZ --> 
<link rel="stylesheet" href="http://netdna.bootstrapcdn.com/bootstrap/3.0.3/css/bootstrap.min.css">
<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.3.14/angular.min.js"></script>
<style>

JavaScript

angular.module('project', [])


.controller('ListCtrl', function($scope) {

})

.directive("myDirective", function(){
   return {
      require: 'ngModel',
       scope: {
           minValue: "=myDirective"
       },
      link: function(scope, element, attrs) {
           //scope.$apply(function () {
           debugger
              attrs.$set('min', '2015-03-21');
           //});
      }
    }
});