diff --git a/includes/views/commerce_reports_handler_field_date.inc b/includes/views/commerce_reports_handler_field_date.inc
index 1febbda..9058b3e 100644
--- a/includes/views/commerce_reports_handler_field_date.inc
+++ b/includes/views/commerce_reports_handler_field_date.inc
@@ -32,7 +32,7 @@ class commerce_reports_handler_field_date extends views_handler_field {
 
   protected function _normalizeMonthly($timestamp) {
     // Workaround for PHP 5.2; PHP 5.3 works with 'first day of this month'
-    return strtotime(date('Y-m', strtotime('this month UTC', $timestamp)) . ' UTC');
+    return strtotime(date('M-01-Y', $timestamp));
   }
 
   function option_definition() {