diff --git a/zephyr/jstemplates/zephyr.html b/zephyr/jstemplates/zephyr.html
index d4acc77295..8bb144246d 100644
--- a/zephyr/jstemplates/zephyr.html
+++ b/zephyr/jstemplates/zephyr.html
@@ -30,7 +30,7 @@
       <span class="zephyr_sender_name">{{sender_name}}</span> <span class="zephyr_sender_email">{{sender_email}}</span>
       <span class="zephyr_sender_username">{{sender}}</span>
     </span>
-    <span class="zephyr_time">{{timestr}}</span>
+    <span class="zephyr_time" title="{{full_date_str}}">{{timestr}}</span>
     <p class="zephyr_text">
     {{{html_content}}}
 </p></td>
diff --git a/zephyr/static/js/zephyr.js b/zephyr/static/js/zephyr.js
index f539ee3e79..201e48d892 100644
--- a/zephyr/static/js/zephyr.js
+++ b/zephyr/static/js/zephyr.js
@@ -504,6 +504,7 @@ function add_message(index, zephyr) {
     var two_digits = function (x) { return ('0' + x).slice(-2); }
     zephyr.timestr = two_digits(time.getHours())
                    + ':' + two_digits(time.getMinutes());
+    zephyr.full_date_str = time.toLocaleString();
 
     var new_tr = $('<tr />').attr('id', zephyr.id).addClass('zephyr_row');
     $('#table').append(new_tr);