Is it possible to hand over Parameters?

If you were to edit the shortcode to function that way, it would require editing the plugin files directly and this is ill-advised to do.

What you could do is use a hidden field that can store the date of the course.

But if I store the date of the course in a hidden field I need to create a form for every single course and this is what I want to avoid.

You wouldn’t need to create a form for every single course if you were to use a hidden field as there is a filter function that you can hook into in order to modify the value of the hidden field.

Do you have any information about this. An example or a link to a guide would be really great ??

Absolutely. Here’s information on how you can manipulate the value of the hidden field using a filter hook: Modifying a Parameter of a Field.

Thank you for the link.
Will try it now.

You are welcome. If you have any further questions, let me know!

Solved the problem now.

The solution if somebody else need something similar:

I installed Shortcode Exec PHP and created a new shortcode called ninja_setfield.

extract(shortcode_atts(array('id' => '0', 'val' => '0'), $atts));

global $ninja_value;
global $ninja_id;
$ninja_value= $val;
$ninja_id = $id;

function my_filter_function( $data, $field_id ){
  global $ninja_value;
  global $ninja_id;
  if( $field_id == $ninja_id){
    $data['default_value'] = $ninja_value;
  }
  return $data;
}
add_filter( 'ninja_forms_field', 'my_filter_function', 10, 2 );

And called the following shortcodes in my article:

[ninja_set_field id=17 val='2015-06-04']
[ninja_forms id=6]

This is a nice solution, but I thought of another solution which would involve using a custom meta field that can be filled out for any post/page in the backend then that value can be easily used in the filter function and this wouldn’t require the use of another shortcode.