diff --git a/source/Ox/js/Fallback.js b/source/Ox/js/Fallback.js
index 2745208f..914a6625 100644
--- a/source/Ox/js/Fallback.js
+++ b/source/Ox/js/Fallback.js
@@ -179,7 +179,7 @@ Ox.fallback.JSON = (function() {
             } else if (type == 'boolean') {
                 ret = String(value);
             } else if (type == 'date') {
-                ret = Ox.getISODate(value);
+                ret = Ox.getISODate(value, true);
             } else if (type == 'number') {
                 ret = isFinite(value) ? String(value) : 'null';
             } else if (type == 'object') {