diff --git a/content/actions/reference/workflow-syntax-for-github-actions.md b/content/actions/reference/workflow-syntax-for-github-actions.md
index 53539e9e5c04..38d2de8a9b57 100644
--- a/content/actions/reference/workflow-syntax-for-github-actions.md
+++ b/content/actions/reference/workflow-syntax-for-github-actions.md
@@ -1019,7 +1019,7 @@ You can create a matrix to run workflows on more than one runner operating syste
 runs-on: ${{ matrix.os }}
 strategy:
   matrix:
-    os: [ubuntu-16.04, ubuntu-18.04]
+    os: [ubuntu-18.04, ubuntu-20.04]
     node: [10, 12, 14]
 steps:
   - uses: actions/setup-node@v2
diff --git a/content/actions/using-github-hosted-runners/about-github-hosted-runners.md b/content/actions/using-github-hosted-runners/about-github-hosted-runners.md
index 6eb8734b54c5..a004f3006643 100644
--- a/content/actions/using-github-hosted-runners/about-github-hosted-runners.md
+++ b/content/actions/using-github-hosted-runners/about-github-hosted-runners.md
@@ -77,7 +77,6 @@ For the overall list of included tools for each runner operating system, see the
 
 * [Ubuntu 20.04 LTS](https://github.com/actions/virtual-environments/blob/main/images/linux/Ubuntu2004-README.md)
 * [Ubuntu 18.04 LTS](https://github.com/actions/virtual-environments/blob/main/images/linux/Ubuntu1804-README.md)
-* [Ubuntu 16.04 LTS](https://github.com/actions/virtual-environments/blob/main/images/linux/Ubuntu1604-README.md)
 * [Windows Server 2019](https://github.com/actions/virtual-environments/blob/main/images/win/Windows2019-Readme.md)
 * [Windows Server 2016](https://github.com/actions/virtual-environments/blob/main/images/win/Windows2016-Readme.md)
 * [macOS 11.0](https://github.com/actions/virtual-environments/blob/main/images/macos/macos-11.0-Readme.md)
diff --git a/data/reusables/github-actions/supported-github-runners.md b/data/reusables/github-actions/supported-github-runners.md
index df406d6f7ec3..ee5f8bf216fb 100644
--- a/data/reusables/github-actions/supported-github-runners.md
+++ b/data/reusables/github-actions/supported-github-runners.md
@@ -1,9 +1,14 @@
+{% warning %}
+
+**Warning**: Ubuntu 16.04 is being deprecated. If any of your workflows use Ubuntu 16.04, migrate to Ubuntu 20.04 or 18.04. For more information, see [the blog post](https://github.blog/changelog/2021-04-29-github-actions-ubuntu-16-04-lts-virtual-environment-will-be-removed-on-september-20-2021).
+
+{% endwarning %}
+
 | Virtual environment | YAML workflow label |
 | --------------------|---------------------|
 | Windows Server 2019 | `windows-latest` or `windows-2019` |
 | Windows Server 2016 | `windows-2016` |
 | Ubuntu 20.04 | `ubuntu-latest` or `ubuntu-20.04` |
 | Ubuntu 18.04 | `ubuntu-18.04` |
-| Ubuntu 16.04 | `ubuntu-16.04` |
 | macOS Big Sur 11.0 | `macos-11.0` |
 | macOS Catalina 10.15 | `macos-latest` or `macos-10.15` |
diff --git a/includes/header.html b/includes/header.html
index d27e2802dccb..e1fc16dd1a25 100644
--- a/includes/header.html
+++ b/includes/header.html
@@ -70,7 +70,7 @@ <h4 class="text-mono f5 text-normal color-text-secondary d-md-none">{% data ui.h
                       {% unless languages[languageVariant.code].wip %}
                         <a
                           href="{{ languageVariant.href }}"
-                          class="d-block py-2 no-underline {% if currentPath == languageVariant.href %}active Link--secondary{% else %}Link--primary{% endif %}"
+                          class="d-block py-2 no-underline {% if currentPath == languageVariant.href %}active {% else %}Link--primary{% endif %}"
                           style="white-space: nowrap"
                         >
                           {% if languages[languageVariant.code].nativeName %}