diff --git a/.github/workflows/X-x86_64_X.yml b/.github/workflows/X-x86_64_X.yml
index 7fb6a59..eddb482 100644
--- a/.github/workflows/X-x86_64_X.yml
+++ b/.github/workflows/X-x86_64_X.yml
@@ -65,7 +65,7 @@ jobs:
     - name: Get current date & Set env
       id: date
       run: |
-        echo "::set-output name=date::$(date +'%Y-%m-%d')"
+        echo "date=$(date +'%Y-%m-%d')" >> "$GITHUB_OUTPUT"
         echo "Release=${{ github.event.inputs.Release }}" >> $GITHUB_ENV
         echo "SharePoint=${{ github.event.inputs.SharePoint }}" >> $GITHUB_ENV
         echo "data2=$(date +'%Y-%m-%d')" >> $GITHUB_OUTPUT
diff --git a/.github/workflows/X-x86_64_Y.yml b/.github/workflows/X-x86_64_Y.yml
index fc463fc..05b908a 100644
--- a/.github/workflows/X-x86_64_Y.yml
+++ b/.github/workflows/X-x86_64_Y.yml
@@ -80,7 +80,7 @@ jobs:
     - name: Set env & Echo System Info
       id: date
       run: |
-        echo "::set-output name=date::$(date +'%Y-%m-%d')"
+        echo "date=$(date +'%Y-%m-%d')" >> "$GITHUB_OUTPUT"
         echo "Release=${{ github.event.inputs.Release }}" >> $GITHUB_ENV
         echo "SharePoint=${{ github.event.inputs.SharePoint }}" >> $GITHUB_ENV
         echo "data2=$(date +'%Y-%m-%d')" >> $GITHUB_OUTPUT
diff --git a/.github/workflows/X-x86_64_Z.yml b/.github/workflows/X-x86_64_Z.yml
index 509f8aa..163f58a 100644
--- a/.github/workflows/X-x86_64_Z.yml
+++ b/.github/workflows/X-x86_64_Z.yml
@@ -81,7 +81,7 @@ jobs:
     - name: Set env & Echo System Info
       id: date
       run: |
-        echo "::set-output name=date::$(date +'%Y-%m-%d')"
+        echo "date=$(date +'%Y-%m-%d')" >> "$GITHUB_OUTPUT"
         echo "Release=${{ github.event.inputs.Release }}" >> $GITHUB_ENV
         echo "SharePoint=${{ github.event.inputs.SharePoint }}" >> $GITHUB_ENV
         echo "data2=$(date +'%Y-%m-%d')" >> $GITHUB_OUTPUT
diff --git a/AI_CHANGELOG_GITHUB_OUTPUT_DATE.md b/AI_CHANGELOG_GITHUB_OUTPUT_DATE.md
new file mode 100644
index 0000000..ce24b6d
--- /dev/null
+++ b/AI_CHANGELOG_GITHUB_OUTPUT_DATE.md
@@ -0,0 +1,11 @@
+# AI Modification Log: GitHub Output Date
+
+Date: 2026-06-29
+
+## Change
+
+- Replaced deprecated `::set-output` date output usage in X/Y/Z workflows with `$GITHUB_OUTPUT`.
+
+## Reason
+
+GitHub Actions deprecated `::set-output`. Writing `date=...` to `$GITHUB_OUTPUT` preserves the `steps.date.outputs.date` value using the supported output mechanism.