Get your own Django server
template.html
views.py
 
<!DOCTYPE html>
<html>
<body>

<h1>{{ marslanding|timeuntil }}</h1>

<p>In views.py you can see what the marslanding variable looks like.</p>

</body>
</html>                  
from django.http import HttpResponse
from django.template import loader
import datetime

def testing(request):
  template = loader.get_template('template.html')
  context = {
    'marslanding': datetime.datetime(2050, 5, 17),   
  }
  return HttpResponse(template.render(context, request))                     
127.0.0.1:8000/testing