diff --git a/.github/workflows/create-and-merge-pr.yaml b/.github/workflows/create-and-merge-pr.yaml
index c908f60..925d1b6 100644
--- a/.github/workflows/create-and-merge-pr.yaml
+++ b/.github/workflows/create-and-merge-pr.yaml
@@ -7,11 +7,16 @@ on:
         description: 'Author of this release'     
         required: false
         type: string
+      timestamp:
+        description: 'Date of this release'     
+        required: false
+        type: string
 
 jobs:
   create-and-merge-pr:
     uses: openactive/skos-vocabulary-workflows/.github/workflows/create-and-merge-pr.yaml@version-file
     with:
       publisher: ${{ github.event.inputs.publisher }}
+      timestamp: ${{ github.event.inputs.timestamp }}
     secrets:
       PUBLIC_REPO_ACCESS_TOKEN: ${{ secrets.PUBLIC_REPO_ACCESS_TOKEN }}