@@ -6,7 +6,7 @@ X-PUBLISHED-TTL:PT1H
 {%- for conf in site.data.conferences -%}
 BEGIN:VEVENT
 SUMMARY:{{ conf.conference }} {{ conf.year }}
-UID:{{ conf.id }}
+UID:{{conf.conference | slugify: "latin"}}-{{conf.year}}
 ORGANIZER:pythondeadlin.es
 DTSTAMP:{{ site.time | date: "%Y%m%dT%H%M%SZ" }}
 DTSTART;VALUE=DATE:{{ conf.start | date: "%Y%m%d"}}
 
@@ -4,16 +4,11 @@ VERSION:2.0
 PRODID:-//{{ site.url }}//{{ site.github_repo }}//EN
 X-PUBLISHED-TTL:PT1H
 {%- for conf in site.data.conferences -%}
-{% if conf.cfp_ext %}
-    {% assign cfp = conf.cfp_ext %}
-    {% assign extended = "(extended)" %}
-{% else %}
-    {% assign cfp = conf.cfp %}
-{% endif %}
+{% if conf.cfp_ext %}{% assign cfp = conf.cfp_ext %}{% assign extended = "(extended)" %}{% else %}{% assign cfp = conf.cfp %}{% endif %}
 {% if conf.workshop_deadline and conf.workshop_deadline != "TBA" %}
 BEGIN:VEVENT
 SUMMARY:{{ conf.conference }} {{ conf.year }} Workshop Deadline
-UID:{{ conf.id }}-workshop {% if conf.timezone contains "UTC" %} {% assign tz = conf.timezone | split: "UTC" %} {% if tz[1] contains "-" %} {% assign tz = tz[1] | replace: "-", "+" %} {% else if tz[1] contains "+" %} {% assign tz = tz[1] | replace: "+", "-" %} {% else assign tz = tz[1] %} {% endif %}
+UID:{{conf.conference | slugify: "latin"}}-{{conf.year}}-workshop {% if conf.timezone contains "UTC" %} {% assign tz = conf.timezone | split: "UTC" %} {% if tz[1] contains "-" %} {% assign tz = tz[1] | replace: "-", "+" %} {% else if tz[1] contains "+" %} {% assign tz = tz[1] | replace: "+", "-" %} {% else assign tz = tz[1] %} {% endif %}
 ORGANIZER:pythondeadlin.es
 DESCRIPTION:<a href="{{conf.link}}">{{ conf.conference }} {{ conf.year }}</a> found on <a href="https://pythondeadlin.es">PythonDeadlin.es</a>.
 DTSTAMP:{{ site.time | date: "%Y%m%dT%H%M%SZ" }}
@@ -27,7 +22,7 @@ DTSTART;TZID={{ conf.timezone }}:{{ conf.workshop_deadline | date: "%Y%m%dT%H%M%
 {% if conf.tutorial_deadline and conf.tutorial_deadline != "TBA" %}
 BEGIN:VEVENT
 SUMMARY:{{ conf.conference }} {{ conf.year }} Tutorial Deadline
-UID:{{ conf.id }}-tutorial {% if conf.timezone contains "UTC" %} {% assign tz = conf.timezone | split: "UTC" %} {% if tz[1] contains "-" %} {% assign tz = tz[1] | replace: "-", "+" %} {% else if tz[1] contains "+" %} {% assign tz = tz[1] | replace: "+", "-" %} {% else assign tz = tz[1] %} {% endif %}
+UID:{{conf.conference | slugify: "latin"}}-{{conf.year}}-tutorial {% if conf.timezone contains "UTC" %} {% assign tz = conf.timezone | split: "UTC" %} {% if tz[1] contains "-" %} {% assign tz = tz[1] | replace: "-", "+" %} {% else if tz[1] contains "+" %} {% assign tz = tz[1] | replace: "+", "-" %} {% else assign tz = tz[1] %} {% endif %}
 ORGANIZER:pythondeadlin.es
 DESCRIPTION:<a href="{{conf.link}}">{{ conf.conference }} {{ conf.year }}</a> found on <a href="https://pythondeadlin.es">PythonDeadlin.es</a>.
 DTSTAMP:{{ site.time | date: "%Y%m%dT%H%M%SZ" }}
@@ -40,7 +35,7 @@ DTSTART;TZID={{ conf.timezone }}:{{ conf.tutorial_deadline | date: "%Y%m%dT%H%M%
 {% endif %}END:VEVENT{% endif %}
 {% if cfp != "TBA" %}BEGIN:VEVENT
 SUMMARY:{{ conf.conference }} {{ conf.year }} Deadline {{ extended }}
-UID:{{ conf.id }} {% if conf.timezone contains "UTC" %} {% assign tz = conf.timezone | split: "UTC" %} {% if tz[1] contains "-" %} {% assign tz = tz[1] | replace: "-", "+" %} {% else if tz[1] contains "+" %} {% assign tz = tz[1] | replace: "+", "-" %} {% else assign tz = tz[1] %} {% endif %}
+UID:{{conf.conference | slugify: "latin"}}-{{conf.year}} {% if conf.timezone contains "UTC" %} {% assign tz = conf.timezone | split: "UTC" %} {% if tz[1] contains "-" %} {% assign tz = tz[1] | replace: "-", "+" %} {% else if tz[1] contains "+" %} {% assign tz = tz[1] | replace: "+", "-" %} {% else assign tz = tz[1] %} {% endif %}
 ORGANIZER:pythondeadlin.es
 DESCRIPTION:<a href="{{conf.link}}">{{ conf.conference }} {{ conf.year }}</a> found on <a href="https://pythondeadlin.es">PythonDeadlin.es</a>.
 DTSTAMP:{{ site.time | date: "%Y%m%dT%H%M%SZ" }}
 
@@ -24,7 +24,7 @@
 				<description>Conference in {{conf.place | xml_escape }} on {% translate_file dates/pretty_dates.html %}. CfP: {{ cfp | xml_escape }} {% if conf.zimezone %}{{ conf.timezone | xml_escape }}{% else%}AoE{% endif %}.{% if conf.twitter %}&lt;br /&gt;Find them here: @{{ conf.twitter}}{% endif %} </description>
 				<pubDate>{{ cfp | date: "%Y-%m-%d %H:%M:%S" | date_to_rfc822 }}</pubDate>
 				<link>https://{{ site.domain }}/conference/{{conf.conference | slugify: "latin"}}-{{conf.year}}/</link>
-				<guid isPermaLink="false">{{ conf.id }}</guid>
+				<guid isPermaLink="false">{{conf.conference | slugify: "latin"}}-{{conf.year}}</guid>
 				<category>{{ conf.sub }}</category>
 			</item>
 		{% endif %}
 
@@ -18,7 +18,7 @@
 				<description><![CDATA[* name of the event: {{conf.conference | xml_escape}} {{ conf.year }}<br/>* type of event: Conference <br/>* focus on Python: Yes<br/>* approximate number of attendees: Unknown<br/>* location (incl. country): {{conf.place | xml_escape }}<br/>* dates/times/recurrence (incl. time zone): {% translate_file dates/pretty_dates.html %}<br/>* HTML link : <a href="{{ conf.link | xml_escape }}">{{ conf.conference | xml_escape }} {{ conf.year }}</a>]]></description>
 				<pubDate>{{ conf.start | date_to_rfc822 }}</pubDate>
 				<link>https://{{ site.domain }}/conference/{{conf.conference | slugify: "latin"}}-{{conf.year}}/</link>
-				<guid isPermaLink="false">{{ conf.id }}</guid>
+				<guid isPermaLink="false">{{conf.conference | slugify: "latin"}}-{{conf.year}}</guid>
 				<category>{{ conf.sub }}</category>
 			</item>
 		{% endfor %}