diff --git a/.github/workflows/devcontainer-cache-build.yaml b/.github/workflows/devcontainer-cache-build.yaml
index 8a3e01b..37133fb 100644
--- a/.github/workflows/devcontainer-cache-build.yaml
+++ b/.github/workflows/devcontainer-cache-build.yaml
@@ -42,6 +42,8 @@ jobs:
     runs-on: ubuntu-24.04
     permissions:
       packages: write
+    env:
+      SOURCE_DATE_EPOCH: 1731797200
     steps:
       - name: Checkout
         uses: actions/checkout@v5.0.0
@@ -54,6 +56,8 @@ jobs:
           registry: ghcr.io
           username: ${{ github.actor }}
           password: ${{ secrets.GITHUB_TOKEN }}
+      - name: Rewrite timestamps
+        run: find . | xargs touch --date="@${SOURCE_DATE_EPOCH}" --no-dereference
       - name: Build devcontainer cache
         id: build-devcontainer-cache
         env:
diff --git a/devcontainer-cache-build-initialize.py b/devcontainer-cache-build-initialize.py
index 1f8091b..25b3da2 100755
--- a/devcontainer-cache-build-initialize.py
+++ b/devcontainer-cache-build-initialize.py
@@ -140,6 +140,7 @@ def docker_destinations_to_string(docker_destination_list):
             {
                 "type": "image",
                 "name": f"{DEVCONTAINER_IMAGE_REF}:{GIT_BRANCH_SANITIZED}",
+                "rewrite-timestamp": True,
                 "push": DEVCONTAINER_PUSH_IMAGE,
             }
         ]