diff --git a/app/assets/javascripts/discourse/components/activity-column.js.es6 b/app/assets/javascripts/discourse/components/activity-column.js.es6
new file mode 100644
index 00000000000..5a758902136
--- /dev/null
+++ b/app/assets/javascripts/discourse/components/activity-column.js.es6
@@ -0,0 +1,45 @@
+import { daysSinceEpoch } from "discourse/helpers/cold-age-class";
+
+export default Ember.Component.extend({
+  tagName: 'td',
+  classNameBindings: [':activity', 'coldness'],
+  attributeBindings: ['title'],
+
+  // returns createdAt if there's no bumped date
+  bumpedAt: function() {
+    var bumpedAt = this.get('topic.bumped_at');
+    if (bumpedAt) {
+      return new Date(bumpedAt);
+    } else {
+      return this.get('createdAt');
+    }
+  }.property('topic.bumped_at', 'createdAt'),
+
+  createdAt: function() {
+    return new Date(this.get('topic.created_at'));
+  }.property('topic.created_at'),
+
+  coldness: function() {
+    var bumpedAt = this.get('bumpedAt'),
+        createdAt = this.get('createdAt');
+
+    if (!bumpedAt) { return; }
+    var delta = daysSinceEpoch(bumpedAt) - daysSinceEpoch(createdAt);
+
+    if (delta > 120) { return 'coldmap-high'; }
+    if (delta > 60) { return 'coldmap-med'; }
+    if (delta > 14) { return 'coldmap-low'; }
+  }.property('bumpedAt', 'createdAt'),
+
+  title: function() {
+    // return {{i18n last_post}}: {{{raw-date topic.bumped_at}}}
+    return I18n.t('first_post') + ": " + Discourse.Formatter.longDate(this.get('createdAt')) + "\n" +
+           I18n.t('last_post') + ": " + Discourse.Formatter.longDate(this.get('bumpedAt'));
+  }.property('bumpedAt', 'createdAt'),
+
+  render: function(buffer) {
+    buffer.push('<a href="' + this.get('topic.lastPostUrl') + '">');
+    buffer.push(Discourse.Formatter.autoUpdatingRelativeAge(this.get('bumpedAt')));
+    buffer.push("</a>");
+  }
+});
diff --git a/app/assets/javascripts/discourse/helpers/application_helpers.js b/app/assets/javascripts/discourse/helpers/application_helpers.js
index 2023c817dce..b10286832f2 100644
--- a/app/assets/javascripts/discourse/helpers/application_helpers.js
+++ b/app/assets/javascripts/discourse/helpers/application_helpers.js
@@ -1,33 +1,5 @@
-// helper function for dates
-function daysSinceEpoch(dt) {
-  // 1000 * 60 * 60 * 24 = days since epoch
-  return dt.getTime() / 86400000;
-}
-
 var safe = Handlebars.SafeString;
 
-/**
-  Converts a date to a coldmap class
-
-  @method cold-age-class
-  @for Handlebars
-**/
-Handlebars.registerHelper('cold-age-class', function(property, options) {
-  var dt = Em.Handlebars.get(this, property, options);
-
-  if (!dt) { return 'age'; }
-
-  // Show heat on age
-  var nowDays = daysSinceEpoch(new Date()),
-      epochDays = daysSinceEpoch(new Date(dt));
-  if (nowDays - epochDays > 60) return 'age coldmap-high';
-  if (nowDays - epochDays > 30) return 'age coldmap-med';
-  if (nowDays - epochDays > 14) return 'age coldmap-low';
-
-  return 'age';
-});
-
-
 /**
   Truncates long strings
 
diff --git a/app/assets/javascripts/discourse/helpers/cold-age-class.js.es6 b/app/assets/javascripts/discourse/helpers/cold-age-class.js.es6
new file mode 100644
index 00000000000..a3bfaf6ea0e
--- /dev/null
+++ b/app/assets/javascripts/discourse/helpers/cold-age-class.js.es6
@@ -0,0 +1,25 @@
+export function daysSinceEpoch(dt) {
+  // 1000 * 60 * 60 * 24 = days since epoch
+  return dt.getTime() / 86400000;
+}
+
+/**
+  Converts a date to a coldmap class
+**/
+function coldAgeClass(property, options) {
+  var dt = Em.Handlebars.get(this, property, options);
+
+  if (!dt) { return 'age'; }
+
+  // Show heat on age
+  var nowDays = daysSinceEpoch(new Date()),
+      epochDays = daysSinceEpoch(new Date(dt));
+  if (nowDays - epochDays > 60) return 'age coldmap-high';
+  if (nowDays - epochDays > 30) return 'age coldmap-med';
+  if (nowDays - epochDays > 14) return 'age coldmap-low';
+
+  return 'age';
+}
+
+Handlebars.registerHelper('cold-age-class', coldAgeClass);
+export default coldAgeClass;
diff --git a/app/assets/javascripts/discourse/models/topic.js b/app/assets/javascripts/discourse/models/topic.js
index 318c8cb3ae3..05663e913cc 100644
--- a/app/assets/javascripts/discourse/models/topic.js
+++ b/app/assets/javascripts/discourse/models/topic.js
@@ -1,11 +1,3 @@
-/**
-  A data model representing a Topic
-
-  @class Topic
-  @extends Discourse.Model
-  @namespace Discourse
-  @module Discourse
-**/
 Discourse.Topic = Discourse.Model.extend({
 
   postStream: function() {
diff --git a/app/assets/javascripts/discourse/templates/components/basic-topic-list.js.handlebars b/app/assets/javascripts/discourse/templates/components/basic-topic-list.js.handlebars
index 1ac50166b70..db42f78a7fd 100644
--- a/app/assets/javascripts/discourse/templates/components/basic-topic-list.js.handlebars
+++ b/app/assets/javascripts/discourse/templates/components/basic-topic-list.js.handlebars
@@ -12,7 +12,7 @@
             <th class="posters">{{i18n users}}</th>
           {{/if}}
           <th class="num views">{{i18n views}}</th>
-          <th class="num activity" colspan="2">{{i18n activity}}</th>
+          <th class="num activity">{{i18n activity}}</th>
         </tr>
       </thead>
 
@@ -55,19 +55,7 @@
               {{number topic.views numberKey="views_long"}}
             </td>
 
-            {{#if topic.bumped}}
-              <td class='num activity'>
-                <a href="{{unbound topic.url}}" class='{{cold-age-class created_at}}' title='{{i18n first_post}}: {{{raw-date topic.created_at}}}' >{{age topic.created_at}}</a>
-              </td>
-              <td class='num activity last'>
-                <a href="{{unbound topic.lastPostUrl}}" class='{{cold-age-class bumped_at}}' title='{{i18n last_post}}: {{{raw-date topic.bumped_at}}}'>{{age topic.bumped_at}}</a>
-              </td>
-            {{else}}
-              <td class='num activity'>
-                <a href="{{unbound topic.url}}" class='age' title='{{i18n first_post}}: {{{raw-date topic.created_at}}}'>{{age topic.created_at}}</a>
-              </td>
-              <td class="activity"></td>
-            {{/if}}
+            {{activity-column topic=topic class="num"}}
           </tr>
         {{/grouped-each}}
       </tbody>
diff --git a/app/assets/javascripts/discourse/templates/components/topic-map.js.handlebars b/app/assets/javascripts/discourse/templates/components/topic-map.js.handlebars
index 7adabfb41c6..7bfe36717b3 100644
--- a/app/assets/javascripts/discourse/templates/components/topic-map.js.handlebars
+++ b/app/assets/javascripts/discourse/templates/components/topic-map.js.handlebars
@@ -21,7 +21,7 @@
       </a>
     </li>
     <li>
-      {{number topic.posts_count}}
+      {{number topic.posts_count class=topic.likesHeat}}
       <h4>{{i18n posts_lowercase}}</h4>
     </li>
     <li class='secondary'>
diff --git a/app/assets/javascripts/discourse/templates/discovery/topics.js.handlebars b/app/assets/javascripts/discourse/templates/discovery/topics.js.handlebars
index c932a1b4af9..91d87043273 100644
--- a/app/assets/javascripts/discourse/templates/discovery/topics.js.handlebars
+++ b/app/assets/javascripts/discourse/templates/discovery/topics.js.handlebars
@@ -54,7 +54,7 @@
         {{#sortable-heading sortBy="views" number=true action="changeSort" order=order ascending=ascending}}
           {{i18n views}}
         {{/sortable-heading}}
-        {{#sortable-heading sortBy="activity" number=true colspan="2" action="changeSort" order=order ascending=ascending}}
+        {{#sortable-heading sortBy="activity" number=true action="changeSort" order=order ascending=ascending}}
           {{i18n activity}}
         {{/sortable-heading}}
       </tr>
diff --git a/app/assets/javascripts/discourse/templates/list/topic_list_item.js.handlebars b/app/assets/javascripts/discourse/templates/list/topic_list_item.js.handlebars
index 3560c5ffe33..4a5ac92d371 100644
--- a/app/assets/javascripts/discourse/templates/list/topic_list_item.js.handlebars
+++ b/app/assets/javascripts/discourse/templates/list/topic_list_item.js.handlebars
@@ -50,16 +50,4 @@
 
 <td {{bind-attr class=":num :views viewsHeat"}}>{{number views numberKey="views_long"}}</td>
 
-{{#if bumped}}
-  <td class='num activity'>
-    <a href="{{url}}" class="{{cold-age-class created_at}}" title='{{i18n first_post}}: {{{raw-date created_at}}}' >{{age created_at}}</a>
-  </td>
-  <td class='num activity last'>
-    <a href="{{lastPostUrl}}" class="{{cold-age-class bumped_at}}" title='{{i18n last_post}}: {{{raw-date bumped_at}}}'>{{age bumped_at}}</a>
-  </td>
-{{else}}
-  <td class='num activity'>
-    <a href="{{url}}" class="{{cold-age-class created_at}}" title='{{i18n first_post}}: {{{raw-date created_at}}}'>{{age created_at}}</a>
-  </td>
-  <td class='activity'></td>
-{{/if}}
+{{activity-column topic=model class="num"}}
diff --git a/app/assets/javascripts/discourse/templates/mobile/components/basic-topic-list.js.handlebars b/app/assets/javascripts/discourse/templates/mobile/components/basic-topic-list.js.handlebars
index 865b4f8fff4..bd16137ba25 100644
--- a/app/assets/javascripts/discourse/templates/mobile/components/basic-topic-list.js.handlebars
+++ b/app/assets/javascripts/discourse/templates/mobile/components/basic-topic-list.js.handlebars
@@ -31,17 +31,9 @@
             <div class="topic-item-stats clearfix">
               <div class="pull-right">
                 <div class='num posts'>
-                  <a href="{{lastUnreadUrl}}">{{number posts_count numberKey="posts_long"}}</a>
+                  <a href="{{lastUnreadUrl}}" {{bind-attr class="likesHeat"}}>{{number posts_count numberKey="posts_long"}}</a>
                 </div>
-                {{#if bumped}}
-                  <div class='num activity last'>
-                    <a href="{{lastPostUrl}}" class='age' title='{{i18n last_post}}: {{{raw-date bumped_at}}}'>{{age bumped_at}}</a>
-                  </div>
-                {{else}}
-                  <div class='num activity last'>
-                    <a href="{{url}}" class='age' title='{{i18n first_post}}: {{{raw-date created_at}}}'>{{age created_at}}</a>
-                  </div>
-                {{/if}}
+                {{activity-column topic=topic tagName="div" class="num activity last"}}
               </div>
               {{#unless controller.hideCategory}}
                 <div class='category'>
diff --git a/app/assets/javascripts/discourse/templates/mobile/list/topic_list_item.js.handlebars b/app/assets/javascripts/discourse/templates/mobile/list/topic_list_item.js.handlebars
index 7b43e73ce3c..4b82b1fc3d1 100644
--- a/app/assets/javascripts/discourse/templates/mobile/list/topic_list_item.js.handlebars
+++ b/app/assets/javascripts/discourse/templates/mobile/list/topic_list_item.js.handlebars
@@ -33,19 +33,12 @@
   {{/unless}}
 
   <div class="pull-right">
-    <div class='num posts'><a href="{{lastUnreadUrl}}">{{number posts_count numberKey="posts_long"}}</a></div>
+    <div class='num posts'><a href="{{lastUnreadUrl}}" {{bind-attr class="likesHeat"}}>{{number posts_count numberKey="posts_long"}}</a></div>
 
-    {{#if bumped}}
-      <div class='num activity last'>
-        <a href="{{lastPostUrl}}" title='{{i18n last_post}}: {{{raw-date bumped_at}}}'>{{last_poster_username}}</a>
-        <a href="{{lastPostUrl}}" class='age' title='{{i18n last_post}}: {{{raw-date bumped_at}}}'>{{age bumped_at}}</a>
-      </div>
-    {{else}}
-      <div class='num activity last'>
-        <a href="{{url}}" title='{{i18n last_post}}: {{{raw-date bumped_at}}}'>{{last_poster_username}}</a>
-        <a href="{{url}}" class='age' title='{{i18n first_post}}: {{{raw-date created_at}}}'>{{age created_at}}</a>
-      </div>
-    {{/if}}
+    <div class='num activity last'>
+      <a href="{{lastPostUrl}}" title='{{i18n last_post}}: {{{raw-date bumped_at}}}'>{{last_poster_username}}</a>
+      {{activity-column topic=this tagName="span" class="age"}}
+    </div>
   </div>
   <div class="clearfix"></div>
 </div>
diff --git a/app/assets/javascripts/main_include.js b/app/assets/javascripts/main_include.js
index f2d404990e0..5a807273115 100644
--- a/app/assets/javascripts/main_include.js
+++ b/app/assets/javascripts/main_include.js
@@ -35,6 +35,7 @@
 //= require ./discourse/routes/build-topic-route
 //= require ./discourse/routes/discourse_restricted_user_route
 //= require ./discourse/components/text-field
+//= require ./discourse/helpers/cold-age-class
 
 //= require ./discourse/dialects/dialect
 //= require_tree ./discourse/dialects