code: def add_date_reminder(self, service, due_date):
          
          args = {
              'item_id': self.id,
              'service': service,
              'type': 'absolute',
              'due_date_utc': due_date
          }
          _perform_command(self.project.owner, 'reminder_add', args)
docs: Add a reminder to the task which activates on a given date.
  
          .. warning:: Requires Todoist premium.
  
          :param service: ```email```, ```sms``` or ```push``` for mobile.
          :type service: str
          :param due_date: The due date in UTC, formatted as
              ```YYYY-MM-DDTHH:MM```
          :type due_date: str
  
          >>> from pytodoist import todoist
          >>> user = todoist.login('john.doe@gmail.com', 'password')
          >>> project = user.get_project('PyTodoist')
          >>> task = project.add_task('Install PyTodoist')
          >>> task.add_date_reminder('email', '2015-12-01T09:00')