You need to add this two line :
gem 'momentjs-rails', '>= 2.9.0'
gem 'bootstrap3-datetimepicker-rails', '~> 4.17.37'
Then, You need to do :
$ bundle
Then, Add the following to your JavaScript manifest file (application.js):
//= require moment
//= require bootstrap-datetimepicker
And, modify your application.css and add :
*= require bootstrap
*= require bootstrap-datetimepicker
And Lastly, In your view file :
<div class='input-group date' id='datetimepicker1'>
<input type='text' class="form-control" />
<span class="input-group-addon">
<span class="glyphicon glyphicon-calendar"></span>
</span>
</div>
<script type="text/javascript">
$(function () {
$('#datetimepicker1').datetimepicker();
});
</script>
This had worked for me.