diff --git a/.github/workflows/docker.yml b/.github/workflows/docker.yml
index 59b58db3..31d3f3db 100644
--- a/.github/workflows/docker.yml
+++ b/.github/workflows/docker.yml
@@ -50,6 +50,7 @@ concurrency:
 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 95ecc1d7..5909d911 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