Edit in JSFiddle

External resources loaded into this fiddle:

<div class="container" style="margin:30px;">
    <div class="form-group">
        <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>
    </div>
</div>

              
$(function () {
    $('#datetimepicker1').datetimepicker({
        format: 'YYYY-MM-DD',
        locale: moment.locale('ja'),
    });
});