diff --git a/core/function.php b/core/function.php
index ed61c8d..1892566 100755
--- a/core/function.php
+++ b/core/function.php
@@ -673,4 +673,13 @@ class html {
 
 }
 
+function sistemadata ($datain) {
+	if ($datain == "") return "";
+	$pezzi = preg_split("/[\.\/-]+/", $datain);
+	if (strlen($pezzi[2]) == 2) {
+		$pezzi[2] = "20".$pezzi[2];
+	}
+	return $pezzi[0].".".$pezzi[1].".".$pezzi[2];
+}
+
 ?>