twig: Format date and time

Task: Display all data from http://atlantic.airtime.pro/api/week-info and display the timestamp human readable.
See how this works:
  1. Template: 
    The program:<br>
{% for key, val in _parent %}
{% if val is iterable %}
{{key}}
<ul>
{% for i in val %}
<li><b> {{i.name}} (id: {{i.id}})</b>: {{i.starts | date("d.m.Y H:i") }} - {{i.ends| date("d.m.Y H:i") }}</li>
{% endfor %}
</ul>
<hr>
{% endif %}
{% endfor %}
    Remember ID of this Template, e.g. TEMPLATE_ID
  2. Shortcode:
    [jsoncontentimporterpro url=http://atlantic.airtime.pro/api/week-info parser=twig id=TEMPLATE_ID]
In Action:
JSON-Decoding failed. Check structure and encoding of JSON-data.