update dates

index.html

@@ -55,10 +55,7 @@ help support Mozilla.
       <section>
         <h2><a href="https://github.com/mozilla/devroadshow2017/blob/master/Cities.md" target="_blank">Upcoming Cities</a></h2>
         <ul>  
-          <li><strong>Apr 25, 2017</strong>: London, UK @ <a href=
+          
-          "https://www.meetup.com/Mozilla-Developer-Roadshow-UK-Edition/events/238928357/?a=socialmedia" target="_blank">Twitter</a></li>
-          <li><strong>Apr 29, 2017</strong>: Berlin, Germany @ <a href=
-          "https://www.facebook.com/events/784179395092898/" target="_blank"> A-MAZE</a></li>
           <li><strong>May 02, 2017</strong>: Hamburg, Germany @ <a href="https://www.meetup.com/decode-hh/events/238288684/" target="_blank">SinnerSchrader</a></li>
           <li><strong>May 04, 2017</strong>: Berlin, Germany @ <a href="https://www.meetup.com/Zalando-Tech-Events-Berlin/events/238078772/" target="_blank">Zalando</a></li>
           <li><strong>May 14, 2017</strong>: Dusseldorf, Germany @ <a href="https://beyondtellerrand.com/events/duesseldorf-2017/side-events/mozilla-roadshow" target="_blank">beyond tellerand</a></li>
@@ -73,6 +70,10 @@ help support Mozilla.
       <section>
         <h2><a href="https://github.com/mozilla/devroadshow2017/blob/master/Cities.md" target="_blank">Past Cities</a></h2>
         <ul>
+          <li><strong>Apr 29, 2017</strong>: Berlin, Germany @ <a href=
+          "https://www.facebook.com/events/784179395092898/" target="_blank"> A-MAZE</a></li>
+          <li><strong>Apr 25, 2017</strong>: London, UK @ <a href=
+          "https://www.meetup.com/Mozilla-Developer-Roadshow-UK-Edition/events/238928357/?a=socialmedia" target="_blank">Twitter</a></li>
           <li><strong>Apr 20, 2017</strong>: Chicago, IL @ <a href="https://generalassemb.ly/education/how-css-grid-is-reinventing-webpage-design/chicago/34896" target="_blank">General Assembly</a></li>
           <li><strong>Apr 19, 2017</strong>: Columbus OH @ <a href="http://columbusjs.org/04-19-2017/mozilla-dev-roadshow.html" target="_blank">CBus</a></li> 
           <li><strong>Apr 06, 2017</strong>: Atlanta, GA @ <a href="https://generalassemb.ly/education/how-css-grid-is-reinventing-webpage-design/atlanta/34844" target="_blank">General Assembly</a></li>