diff --git a/htdocs/webservices/server_productorservice.php b/htdocs/webservices/server_productorservice.php
index d1fb254c46b..f9cc7334828 100755
--- a/htdocs/webservices/server_productorservice.php
+++ b/htdocs/webservices/server_productorservice.php
@@ -263,8 +263,8 @@ function getProductOrService($authentication,$id='',$ref='',$ref_ext='')
 			   			'ref_ext' => $product->ref_ext,
 			    		'label' => $product->label,
 			    		'description' => $product->description,
-			    		'date_creation' => $product->date_creation,
-			    		'date_modification' => $product->date_modification,
+			    		'date_creation' => dol_print_date($product->date_creation,'dayhourrfc'),
+			    		'date_modification' => dol_print_date($product->date_modification,'dayhourrfc'),
 			            'note' => $product->note,
 			            'status_tosell' => $product->status,
 			            'status_tobuy' => $product->status_buy,