diff --git a/docs/gantt.md b/docs/gantt.md
index db50a8f2a..eb3dfff29 100755
--- a/docs/gantt.md
+++ b/docs/gantt.md
@@ -15,18 +15,6 @@ gantt
     Task in sec      :2014-01-12  , 12d
     another task      : 24d
 ```
-```mermaid
-gantt
-    title A Gantt Diagram
-    dateFormat  YYYY-MM-DD
-    section Section
-    A task           :a1, 2014-01-01, 30d
-    Another task     :after a1  , 20d
-    section Another
-    Task in sec      :2014-01-12  , 12d
-    another task      : 24d
-```
-
 
 ## Syntax
 
@@ -106,7 +94,11 @@ Tbd
 
 ### Date format
 
-The default date format is YYYY-MM-DD
+The default date format is YYYY-MM-DD. You can define your ``dateFormat``. For example:
+
+```
+dateFormat YYYY MM DD
+```
 
 
 ### Diagram definition