<div>
    <div flex-gt-xs>
      <md-datepicker ng-model="myDate" md-placeholder="Enter end date"
          md-min-date="minDate" md-max-date="maxDate" ng-change="send1()"></md-datepicker>
    </div>
</div>
<script>
  (function(scope) {

         scope.myDate = new Date();

         scope.minDate = new Date(
             scope.myDate.getFullYear(),
             scope.myDate.getMonth(),
             15);

         scope.maxDate = new Date(
             scope.myDate.getFullYear(),
             scope.myDate.getMonth(),
             scope.myDate.getDate());


 })(scope);

 scope.send1 = function() {

     if (!this.msg) this.msg = {};

     if (!this.msg.payload) this.msg.payload = {};

     this.msg.payload = this.myDate;

     this.send(this.msg);

 }.bind(scope);
</script>