diff --git a/src/interfaces/extension.ts b/src/interfaces/extension.ts
index e156d1f..25d8764 100644
--- a/src/interfaces/extension.ts
+++ b/src/interfaces/extension.ts
@@ -44,6 +44,11 @@ class Extension {
         }
         return result;
     }
+
+    public static ToThaiFullDate(value: Date) {
+        let yy = value.getFullYear() < 2400 ? value.getFullYear() + 543 : value.getFullYear();
+        return "วันที่ "+ value.getDate() +" เดือน "+ Extension.ToThaiMonth(value.getMonth() + 1)+ " พ.ศ. " + yy;
+    }
 }
 
 export default Extension;