Date/Time picker in html + django

I am trying to find solution for my problem, but unfortunately there is no answers. I need one button which will paste current date/time in one if the inputs on my html form. Website is made with django.

I need to put button beside .

        <div id='wazne'>
        :   <br><br>
    :   <br><br>
        :  <br><br>
        :  <br><br>
    :  <br>
    </div>