diff --git a/README.md b/README.md
index 9a5904bbd..725e8d6a9 100644
--- a/README.md
+++ b/README.md
@@ -43,7 +43,7 @@ ___
     * [`{{sha}}`](#sha)
     * [`{{base_ref}}`](#base_ref)
     * [`{{is_default_branch}}`](#is_default_branch)
-    * [`{{date '<format>'}}`](#date-format)
+    * [`{{date '<format>' tz='<timezone>'}}`](#date-format)
   * [Major version zero](#major-version-zero)
   * [JSON output object](#json-output-object)
   * [Overwrite labels](#overwrite-labels)
@@ -778,14 +778,15 @@ workflow run. Will be empty for a branch reference:
 Returns `true` if the branch that triggered the workflow run is the default
 one, otherwise `false`.
 
-#### `{{date '<format>'}}`
+#### `{{date '<format>' tz='<timezone>'}}`
 
-Returns the current date rendered by its [moment format](https://momentjs.com/docs/#/displaying/format/).
+Returns the current date rendered by its [moment format](https://momentjs.com/docs/#/displaying/format/). Default `tz` is UTC.
 
-| Expression                                 | Output example                          |
-|--------------------------------------------|-----------------------------------------|
-| `{{date 'YYYYMMDD'}}`                      | `20200110`                              |
-| `{{date 'dddd, MMMM Do YYYY, h:mm:ss a'}}` | `Friday, January 10th 2020, 3:25:50 pm` |
+| Expression                                                 | Output example                             |
+|------------------------------------------------------------|--------------------------------------------|
+| `{{date 'YYYYMMDD'}}`                                      | `20200110`                                 |
+| `{{date 'dddd, MMMM Do YYYY, h:mm:ss a'}}`                 | `Friday, January 10th 2020, 3:25:50 pm`    |
+| `{{date 'dddd, MMMM Do YYYY, h:mm:ss a' tz='Asia/Tokyo'}}` | `Saturday, January 11th 2020, 12:25:50 am` |
 
 ### Major version zero