diff --git a/.github/workflows/docker-amd64.yml b/.github/workflows/docker-amd64.yml
index c41084edb6..5ae7252cca 100644
--- a/.github/workflows/docker-amd64.yml
+++ b/.github/workflows/docker-amd64.yml
@@ -43,6 +43,11 @@ on:
       - "requirements-dev.txt"
   workflow_dispatch:
 
+concurrency:
+  # only cancel in-progress jobs or runs for the current workflow - matches against branch & tags
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
 jobs:
   build-test-amd64-images:
     name: Build and test amd64 Docker Images
diff --git a/.github/workflows/docker.yml b/.github/workflows/docker.yml
index fd0b08b576..edc73b5bcd 100644
--- a/.github/workflows/docker.yml
+++ b/.github/workflows/docker.yml
@@ -43,9 +43,15 @@ on:
       - "requirements-dev.txt"
   workflow_dispatch:
 
+concurrency:
+  # only cancel in-progress jobs or runs for the current workflow - matches against branch & tags
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
 jobs:
   build-test-publish-images:
     name: Build, test, and publish Docker Images
+    if: github.event_name != 'schedule' || (github.event_name == 'schedule' && github.repository == 'jupyter/docker-stacks')
     runs-on: ubuntu-latest
     permissions:
       contents: write
diff --git a/.github/workflows/sphinx.yml b/.github/workflows/sphinx.yml
index 95ecc1d70f..5909d91140 100644
--- a/.github/workflows/sphinx.yml
+++ b/.github/workflows/sphinx.yml
@@ -26,6 +26,7 @@ on:
 jobs:
   build-docs:
     name: Build Sphinx Documentation
+    if: github.event_name != 'schedule' || (github.event_name == 'schedule' && github.repository == 'jupyter/docker-stacks')
     runs-on: ubuntu-latest
     permissions:
       contents: write