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docs/syntax/gantt.md

@@ -337,6 +337,56 @@ gantt
 ```
 
 > **Warning** > `millisecond` and `second` support was added in v10.3.0
+>
+> ### Changing Today (v\<MERMAID_RELEASE_VERSION>+)
+>
+> By default, the today marker uses the current date. Use `today` to set a custom date, using the `dateFormat`.
+>
+> ```mermaid-example
+> gantt
+>     title A Gantt Diagram With Custom Today
+>     dateFormat YYYY-MM-DD
+>     today 2024-01-20
+>     section Section
+>         A task          :a1, 2024-01-01, 30d
+>         Another task    :after a1, 20d
+> ```
+
+You can also use a duration:
+
+```mermaid-example
+---
+displayMode: compact
+---
+gantt
+    title A Gantt Diagram With Custom Today (Duration)
+    dateFormat  x
+    axisFormat  %L ms
+    today       18ms
+    todayMarker stroke-width:2px,stroke:#FF0,opacity:0.5
+    section Graphics
+    Draw 1:  a1, 0, 28ms
+    Draw 2:  after a1, 20ms
+    section Compute
+    Kernel:  b1, 20, 12ms
+```
+
+```mermaid
+---
+displayMode: compact
+---
+gantt
+    title A Gantt Diagram With Custom Today (Duration)
+    dateFormat  x
+    axisFormat  %L ms
+    today       18ms
+    todayMarker stroke-width:2px,stroke:#FF0,opacity:0.5
+    section Graphics
+    Draw 1:  a1, 0, 28ms
+    Draw 2:  after a1, 20ms
+    section Compute
+    Kernel:  b1, 20, 12ms
+```
 
 ## Output in compact mode
 

packages/mermaid/src/docs/syntax/gantt.md

@@ -251,7 +251,7 @@ gantt
   weekday monday
 ```
 
-```warning
+````warning
 `millisecond` and `second` support was added in v10.3.0
 
 ### Changing Today (v\<MERMAID_RELEASE_VERSION>+)
@@ -266,7 +266,7 @@ gantt
     section Section
         A task          :a1, 2024-01-01, 30d
         Another task    :after a1, 20d
-```
+````
 
 You can also use a duration: