Website build SUMO website/master-286
diff --git a/2020/index.html b/2020/index.html
index 4e9642f..0291f91 100644
--- a/2020/index.html
+++ b/2020/index.html
@@ -246,8 +246,8 @@
 
 <ul>
 <li>ECN-based Mitigation of Congestion in Urban Traffic Networks - <em>Levente Alekszejenkó and Tadeusz P. Dobrowiecki</em> • <a href="https://www.youtube.com/watch?v=5tsTcpOLrLY"><i class="fab fa-youtube"></i> Video</a> • <a href="https://sumo.dlr.de/2020/SUMO2020_paper_26.pdf"><i class="far fa-file-pdf"></i> Paper</a></li>
-<li>Extending the Intelligent Driver Model in SUMO and Verifying the Drive Off Trajectories with Aerial Measurements - <em>Dominik Salles, Stefan Kaufmann and Hans-Christian Reuss</em> • <a href="https://sumo.dlr.de/2020/SUMO2020_paper_28.pdf"><i class="far fa-file-pdf"></i> Paper</a></li>
-<li>A Slipstreaming Model for Cooperative Driving Simulations in SUMO - <em>Andrea Stedile and Michele Segata</em></li>
+<li>Extending the Intelligent Driver Model in SUMO and Verifying the Drive Off Trajectories with Aerial Measurements - <em>Dominik Salles, Stefan Kaufmann and Hans-Christian Reuss</em> • <a href="https://www.youtube.com/watch?v=0VuSguxDVv8"><i class="fab fa-youtube"></i> Video</a> • <a href="https://sumo.dlr.de/2020/SUMO2020_paper_28.pdf"><i class="far fa-file-pdf"></i> Paper</a></li>
+<li>A Slipstreaming Model for Cooperative Driving Simulations in SUMO - <em>Andrea Stedile and Michele Segata</em> • <a href="https://www.youtube.com/watch?v=ihjJ-9O-tq0"><i class="fab fa-youtube"></i> Video</a></li>
 </ul>
 
 <hr />
diff --git a/conference/index.html b/conference/index.html
index 99c59a0..77abda3 100644
--- a/conference/index.html
+++ b/conference/index.html
@@ -165,6 +165,11 @@
       
       
 
+<div class="alert alert-warning alert-dismissible">
+    <button type="button" class="close" data-dismiss="alert">&times;</button>
+    Paper and Abstract Submission Deadline is now <b>Monday, May 17th, 2021</b>.
+</div>
+
 <h1 id="introduction">Introduction</h1>
 
 <p>Traffic simulations are of immense importance for researchers as well as practitioners in the field of transportation. SUMO has been available since 2001 and provides a wide range of traffic planning and simulation applications. SUMO consists of a suite of tools covering road network imports and enrichment, demand generation and assignment, and a state-of-the-art microscopic traffic simulator capable of simulating private and public transport modes, as well as person-based trip chains. Being open source, SUMO is easily extensible by new behavioral models and can be dynamically controlled via a well-defined programming interface. These and other features make SUMO one of the most often used open source traffic simulators with a large and international user community.</p>
@@ -198,7 +203,7 @@
 <li>All accepted scientific papers must be presented at the conference.</li>
 <li>Scientific papers will be reviewed by at least 2 reviewers.</li>
 <li>All accepted scientific papers will be published in the SUMO proceedings.</li>
-<li>Scientific papers must be submitted in LaTeX or Word format before midnight, <strong>Monday, May 3rd, 2021</strong>.</li>
+<li>Scientific papers must be submitted in LaTeX or Word format before midnight, <em><del>Monday, May 3rd, 2021</del></em> <strong>Monday, May 17th, 2021</strong>.</li>
 <li>Scientific papers should be between 5 and 20 pages long.</li>
 </ul>
 
@@ -216,7 +221,7 @@
 <li>Project Presentations</li>
 <li>Work in Progress which would benefit from the feedback of other SUMO users</li>
 </ul></li>
-<li>Title and a short abstract (300 words) must be submitted until <strong>Monday, May 3rd, 2021</strong>.</li>
+<li>Title and a short abstract (300 words) must be submitted until <em><del>Monday, May 3rd, 2021</del></em> <strong>Monday, May 17th, 2021</strong>.</li>
 </ul>
 
 <p><strong>Templates and instructions for authors</strong> can be found here: <a href="https://easychair.org/publications/for_authors">https://easychair.org/publications/for_authors</a><br />
@@ -230,7 +235,7 @@
 <h1 id="important-dates">Important Dates</h1>
 
 <ul>
-<li>Paper and Abstract Submission Deadline: <strong>Monday, May 3rd, 2021</strong>.</li>
+<li>Paper and Abstract Submission Deadline: <em><del>Monday, May 3rd, 2021</del></em> <strong>Monday, May 17th, 2021</strong>.</li>
 <li>Notification of Acceptance:  <strong>End of June, 2021</strong>.</li>
 <li>Camera Ready version due: <strong>Monday, July 19th, 2021</strong>.</li>
 </ul>
diff --git a/contact/index.html b/contact/index.html
index f8db4d6..032038a 100644
--- a/contact/index.html
+++ b/contact/index.html
@@ -205,7 +205,7 @@
 
 <p>To <strong>unsubscribe</strong> visit the same link(s) as given above for subscription. An easy way to subscribe (or unsubscribe) is to write an email to <a href="mailto:sumo-user-join@eclipse.org">sumo-user-join@eclipse.org</a> or <a href="mailto:sumo-user-leave@eclipse.org">sumo-user-leave@eclipse.org</a>. Make sure to use the right sender address (subject and body can be empty). This works for the dev and the announce list as well.</p>
 
-<div class="container alert alert-info alert-dismissible" style="margin-bottom:0;">
+<div class="container alert alert-success alert-dismissible" style="margin-bottom:0;">
     There is also a <a href="http://sumo-user.90755.n8.nabble.com/">forum available</a> to access the <b>sumo-user</b> mailing list. Please be aware that every message to the forum also goes to all sumo-user subscribers and vice versa. You need to register for the forum, but you only need a valid email, not an Eclipse account.
 </div>
 </div>
diff --git a/css/custom.css b/css/custom.css
index eb6ad88..d90a0c6 100644
--- a/css/custom.css
+++ b/css/custom.css
@@ -156,18 +156,6 @@
 box-shadow: rgba(0,0,0,0.05) 0px 1px 4px 0px,rgba(0,0,0,0.025) 0px 15px 20px -1px;
 }
 
-.alert-info {
-color: #000000;
-background-color: rgb(190,228,192);
-border-color: #338033;
-}
-
-.alert-warning {
-color: #000000;
-border: 1px dashed #ff8800;
-padding: .5em;
-}
-
 .device-laptop .computer-container {
 display: block;
 height: auto;
diff --git a/index.html b/index.html
index 0222400..c0a8e1e 100644
--- a/index.html
+++ b/index.html
@@ -256,7 +256,7 @@
 <div class="card" style="border: 1px solid rgba(0,0,0,.25) !important;">
   <div class="card-header" style="font-weight:bold;">SUMO User Conference 2021</div>
   <div class="card-body">
-  Submit your papers via EasyChair <a href="https://easychair.org/conferences/?conf=sumo2021"><b>here</b></a>
+  Submit your papers via EasyChair <a href="https://easychair.org/conferences/?conf=sumo2021"><b>here</b></a> - Paper and Abstract Submission Deadline is now <b>Monday, May 17th, 2021</b>.
   </div>
 </div>
 
diff --git a/index.xml b/index.xml
index b196150..6c48712 100644
--- a/index.xml
+++ b/index.xml
@@ -106,7 +106,7 @@
       <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
       
       <guid>https://www.eclipse.org/sumo/conference/</guid>
-      <description>Introduction Traffic simulations are of immense importance for researchers as well as practitioners in the field of transportation. SUMO has been available since 2001 and provides a wide range of traffic planning and simulation applications. SUMO consists of a suite of tools covering road network imports and enrichment, demand generation and assignment, and a state-of-the-art microscopic traffic simulator capable of simulating private and public transport modes, as well as person-based trip chains.</description>
+      <description>&amp;times; Paper and Abstract Submission Deadline is now Monday, May 17th, 2021.  Introduction Traffic simulations are of immense importance for researchers as well as practitioners in the field of transportation. SUMO has been available since 2001 and provides a wide range of traffic planning and simulation applications. SUMO consists of a suite of tools covering road network imports and enrichment, demand generation and assignment, and a state-of-the-art microscopic traffic simulator capable of simulating private and public transport modes, as well as person-based trip chains.</description>
     </item>
     
   </channel>