diff --git a/backup/restore_check.html b/backup/restore_check.html
index a7636e31dc9..e93aedc8dec 100644
--- a/backup/restore_check.html
+++ b/backup/restore_check.html
@@ -20,11 +20,19 @@
         $currentcourseshortname = $course_header->course_shortname; //"store_ShortName";
         $course_header->course_shortname =  stripslashes_safe($form1->shortname);  //"update_ShortName";    
         $course_header->course_fullname =   stripslashes_safe($form1->fullname);   //"update_FullName";  
-        $form1->startdate = make_timestamp($form1->startyear, $form1->startmonth, $form1->startday);          
-        $currentcoursestartdate = $course_header->course_startdate;
-        $coursestartdatedateoffset = $form1->startdate - $currentcoursestartdate;
-        $restore->course_startdateoffset = $coursestartdatedateoffset; //change to restore
-    } 
+    /// Roll dates only if the backup course has a start date
+    /// (some formats like main page, social..., haven't it and rolling dates
+    /// from 0 produces crazy dates. MDL-10125
+        if ($course_header->course_startdate) {
+            $form1->startdate = make_timestamp($form1->startyear, $form1->startmonth, $form1->startday);
+            $currentcoursestartdate = $course_header->course_startdate;
+            $coursestartdatedateoffset = $form1->startdate - $currentcoursestartdate;
+            $restore->course_startdateoffset = $coursestartdatedateoffset; //change to restore
+        } else { // don't roll if the course hasn't start date
+            $coursestartdatedateoffset = 0;
+            $restore->course_startdateoffset = 0;
+        }
+    }
 
     ///Enforce SESSION->course_header rewrite (PHP 4.x needed because assigns are by value) MDL-8298
     $SESSION->course_header = $course_header;
diff --git a/backup/restore_form.html b/backup/restore_form.html
index 8e0c972a2bf..dfb1481be70 100644
--- a/backup/restore_form.html
+++ b/backup/restore_form.html
@@ -235,9 +235,19 @@ function selectItemInCheckboxByName(formId, checkName, checked ) {
         echo"</td></tr>";
         echo "<tr valign=\"top\"> ";
         echo "<td align=\"right\"> ";
-        print_string("startdate"); 
-        echo ":</td><td>"; 
-        print_date_selector("startday", "startmonth", "startyear", $form1->startdate);
+        print_string("startdate");
+        echo ":</td><td>";
+    /// Show the roll dates option only if the backup course has a start date
+    /// (some formats like main page, social..., haven't it and rolling dates
+    /// from 0 produces crazy dates. MDL-10125
+        if ($form1->startdate) {
+            print_date_selector("startday", "startmonth", "startyear", $form1->startdate);
+        } else {
+            print_string('notavailable');
+            echo '<input type="hidden" name="startyear" value="0" />';
+            echo '<input type="hidden" name="startmonth" value="0" />';
+            echo '<input type="hidden" name="startday" value="0" />';
+        }
         helpbutton("coursestartdate", get_string("startdate"));
         echo "</td></tr>";
     }