diff --git a/Universal/DateTime.h b/Universal/DateTime.h
index 4b3d1ca..88b66f4 100644
--- a/Universal/DateTime.h
+++ b/Universal/DateTime.h
@@ -34,6 +34,12 @@ public:
 
     Week week() const;
     std::chrono::time_point<std::chrono::system_clock> operator()();
+
+    /**
+     * @brief toString
+     * @param format %Y%m%d%H%M%S 20240715171145
+     * @return
+     */
     std::string toString(const std::string_view &format = "%F %T") const;
 
     /**