diff --git a/playground/nutech/issue/STCl-schema.json b/playground/nutech/issue/STCl-schema.json
index 6d801a52..09437aa6 100644
--- a/playground/nutech/issue/STCl-schema.json
+++ b/playground/nutech/issue/STCl-schema.json
@@ -47,7 +47,7 @@
     "gmthmtno": {
       "type": "string",
       "title": "Demand Date",
-      "format": "date"
+      "format": "GMT"
     },
     "receivername": {
       "type": "integer",