When  submitting the form i am not able to get newly selected date value

This is my submit function of form 
<form name="aboutMeForm" ng-submit = "submitAboutMe(aboutMe, aboutMeForm, profilePhoto)" class="aboutMeForm" ng-class="{submitted:aboutMeForm.submitted}"  novalidate>

 <input rsmdatedropdowns ng-model="aboutMe.birthday"/>   

<input type="Submit">
