diff --git a/web/app/assets/javascripts/sessionList.js b/web/app/assets/javascripts/sessionList.js
index 20fc83c53..f615f3774 100644
--- a/web/app/assets/javascripts/sessionList.js
+++ b/web/app/assets/javascripts/sessionList.js
@@ -19,6 +19,7 @@
     var $musicianTemplate = $('#template-musician-info');
     var showJoinLink = true;
     var showListenLink = true;
+    var MAX_MINUTES_SHOW_START = 15;
 
     // related to listen
     function stateChange(e, data) {
@@ -360,6 +361,13 @@
       var noLinkText = '';
       $('.rsvp-link-text', $parentRow).hide();
 
+      function showStartSessionButton(scheduledStart) {
+        var now = new Date();
+        var scheduledDate = new Date(scheduledStart);
+        var minutesFromStart = (scheduledDate.getTime() - now.getTime()) / (1000 * 60);
+        return minutesFromStart <= MAX_MINUTES_SHOW_START;
+      };
+
       if (session.creator.id === context.JK.currentUserId) {
         showRsvpLink = false;
         noLinkText = $('<span class="text"><a href="#" style="color: #fc0">Start session now?</a></span>');
@@ -370,13 +378,17 @@
       }
       else if (approvedRsvpId) {
         showRsvpLink = false;
-        noLinkText = $('<span class="text"><a class="start" style="color: #fc0">Start session now?</a>&nbsp;|&nbsp;<a class="cancel" style="color: #fc0">Cancel RSVP</a></span>');
 
-        // wire start link
-        noLinkText.find('a.start').click(function() {
-          ui.launchSessionStartDialog(session);
-          return false;
-        });
+        if (showStartSessionButton(session.scheduled_start)) {
+          noLinkText = $('<span class="text"><a class="start" style="color: #fc0">Start session now?</a>&nbsp;|&nbsp;<a class="cancel" style="color: #fc0">Cancel RSVP</a></span>');
+          noLinkText.find('a.start').click(function() {
+            ui.launchSessionStartDialog(session);
+            return false;
+          });
+        }
+        else {
+          noLinkText = $('<span class="text"><a class="cancel" style="color: #fc0">Cancel RSVP</a></span>');
+        }
 
         // wire cancel link
         noLinkText.find('a.cancel').click(function() {
@@ -395,11 +407,14 @@
       }
       else if (hasInvitation) {
         showRsvpLink = false;
-        noLinkText = $('<span class="text"><a href="#" style="color: #fc0">Start session now?</a></span>');
-        noLinkText.find('a').click(function() {
-          ui.launchSessionStartDialog(session);
-          return false;
-        });
+
+        if (showStartSessionButton(session.scheduled_start)) {
+          noLinkText = $('<span class="text"><a href="#" style="color: #fc0">Start session now?</a></span>');
+          noLinkText.find('a').click(function() {
+            ui.launchSessionStartDialog(session);
+            return false;
+          });
+        }
       }
       else if (pendingRsvpId) {
         showRsvpLink = false;
diff --git a/web/app/views/dialogs/_sessionStartDialog.html.slim b/web/app/views/dialogs/_sessionStartDialog.html.slim
index e9695cb6c..5117beca0 100644
--- a/web/app/views/dialogs/_sessionStartDialog.html.slim
+++ b/web/app/views/dialogs/_sessionStartDialog.html.slim
@@ -25,7 +25,7 @@
         h3.mt20 What instruments/parts do you need?
         .left.ib.w20.mt5 Me:
         #session-instruments-me-disp.left.ib.w75.mt5
-        .clearall.left.ib.w20 Others:
+        .clearall.left.ib.w20.mt5 Others:
         #session-instruments-rsvp-disp.left.ib.w75.mt5
         br clear='all'