diff --git a/html/ops/build_po.php b/html/ops/build_po.php
index f1b6e2d352..f9253ec603 100755
--- a/html/ops/build_po.php
+++ b/html/ops/build_po.php
@@ -17,7 +17,7 @@ if (!isset($FILE_LIST)) {
exit;
}
-$date = strftime('%Y-%m-%d %H:%M %Z');
+$date = date(DATE_RFC2822);
$header = <<