diff --git a/docroot/sites/all/modules/contrib/heartbeat/heartbeat.module b/docroot/sites/all/modules/contrib/heartbeat/heartbeat.module
index d06fa83..d6f3fdd 100644
--- a/docroot/sites/all/modules/contrib/heartbeat/heartbeat.module
+++ b/docroot/sites/all/modules/contrib/heartbeat/heartbeat.module
@@ -1755,3 +1755,36 @@ function _heartbeat_perms_options($profile = FALSE) {
     );
   }
 }
+
+/**
+ * Implement hook_date_api_tables().
+ */
+function heartbeat_date_api_tables() {
+  return array('heartbeat_activity');
+}
+
+/**
+ * Implementation of hook_date_api_fields().
+ */
+function heartbeat_date_api_fields($field) {
+  $values = array(
+    // The type of date: DATE_UNIX, DATE_ISO, DATE_DATETIME.
+    'sql_type' => DATE_UNIX,
+    // Timezone handling options: 'none', 'site', 'date', 'utc'.
+    'tz_handling' => 'site',
+    // Needed only for dates that use 'date' tz_handling.
+    'timezone_field' => '',
+    // Needed only for dates that use 'date' tz_handling.
+    'offset_field' => '',
+    // Array of "table.field" values for related fields that should be
+    // loaded automatically in the Views SQL.
+    'related_fields' => array(),
+    // Granularity of this date field's db data.
+    'granularity' => array('year', 'month', 'day', 'hour', 'minute', 'second'),
+  );
+
+  switch ($field) {
+    case 'heartbeat_activity.timestamp':
+      return $values;
+  }
+}