Added calendar in the footer

_config.yml

@@ -46,6 +46,7 @@ social:
   twitter: "poul_polimi"
   github: "Politecnico-Open-unix-Labs"
   youtube: "POuLpolimi"
+  calendar: "https://go.poul.org/calendar"
   rss: "/feed.xml"
   email: "https://list.poul.org/postorius/lists/mailinglist.poul.org/"
 

_includes/footer.html

@@ -25,6 +25,9 @@
 		{% if site.social.github %}
 		<a href="https://github.com/{{ site.social.github }}"><i class="fa fa-github"></i></a>
 		{% endif %}
+		{% if site.social.calendar %}
+		<a href="{{ site.social.calendar }}" target="_blank"><i class="fa fa-calendar"></i></a>
+		{% endif %}
 		{% if site.social.rss %}
 		<a href="{{ site.social.rss }}"><i class="fa fa-rss"></i></a>
 		{% endif %}