diff --git a/common/legacy.php b/common/legacy.php
index df21108cb..7d86ffc1a 100644
--- a/common/legacy.php
+++ b/common/legacy.php
@@ -578,7 +578,8 @@ function ztime($str)
 	{
 		$hour = $min = $sec = 0;
 	}
-	return mktime($hour, $min, $sec, $month, $day, $year);
+	$offset = Rhymix\Framework\Config::get('locale.internal_timezone') ?: date('Z');
+	return gmmktime($hour, $min, $sec, $month, $day, $year) - $offset;
 }
 
 /**