diff --git a/assets/src/scss/pages/post/_post.scss b/assets/src/scss/pages/post/_post.scss
index b0df29682b..bcc0c6e779 100644
--- a/assets/src/scss/pages/post/_post.scss
+++ b/assets/src/scss/pages/post/_post.scss
@@ -99,3 +99,30 @@
 .post-tags {
   margin-bottom: $sp-2;
 }
+
+.single-post-old-posts-archive-notice {
+  background-color: var(--beige-100);
+  padding: $sp-3;
+  margin-top: $sp-3;
+
+  @include medium-and-up {
+    padding: $sp-3 $sp-8;
+  }
+
+  a {
+    margin: 0 auto;
+    display: block;
+    width: fit-content;
+  }
+
+  h4 {
+    text-align: center;
+    margin: 0;
+  }
+
+  p {
+    font-size: var(--font-size-m--font-family-secondary);
+    line-height: var(--line-height-m--font-family-secondary);
+    margin: $sp-3 0;
+  }
+}
diff --git a/single.php b/single.php
index e3ba3152a5..9f0ecebe13 100755
--- a/single.php
+++ b/single.php
@@ -48,6 +48,7 @@
 $context['post_categories'] = implode(', ', $post->categories());
 // We need the explode because we want to remove "+00:00" at the end of the string.
 $context['page_date'] = explode('+', get_the_date('c', $post->ID))[0];
+$context['old_posts_archive_notice'] = $post->get_old_posts_archive_notice();
 
 Context::set_og_meta_fields($context, $post);
 Context::set_campaign_datalayer($context, $page_meta_data);
diff --git a/src/Features/OldPostsArchiveNotice.php b/src/Features/OldPostsArchiveNotice.php
new file mode 100644
index 0000000000..9274620166
--- /dev/null
+++ b/src/Features/OldPostsArchiveNotice.php
@@ -0,0 +1,47 @@
+<?php
+
+namespace P4\MasterTheme\Features;
+
+use P4\MasterTheme\Feature;
+
+/**
+ * @see description().
+ */
+class OldPostsArchiveNotice extends Feature
+{
+    /**
+     * @inheritDoc
+     */
+    public static function id(): string
+    {
+        return 'old_posts_archive_notice';
+    }
+
+    /**
+     * @inheritDoc
+     */
+    protected static function name(): string
+    {
+        return __('Old Posts Archive notice', 'planet4-master-theme-backend');
+    }
+
+    /**
+     * @inheritDoc
+     */
+    protected static function description(): string
+    {
+        return __(
+            // phpcs:ignore Generic.Files.LineLength.MaxExceeded
+            'Displays a notice on top of old Posts.<br>Adjust its behavior and text through <a href="/wp-admin/admin.php?page=planet4_settings_defaults_content" href="_self">Defaults content settings.</a>',
+            'planet4-master-theme-backend'
+        );
+    }
+
+    /**
+     * @inheritDoc
+     */
+    public static function show_toggle_production(): bool
+    {
+        return true;
+    }
+}
diff --git a/src/Migrations/M034PrePopulateOldPostsArchiveNotice.php b/src/Migrations/M034PrePopulateOldPostsArchiveNotice.php
new file mode 100644
index 0000000000..a0a6a82275
--- /dev/null
+++ b/src/Migrations/M034PrePopulateOldPostsArchiveNotice.php
@@ -0,0 +1,49 @@
+<?php
+
+declare(strict_types=1);
+
+namespace P4\MasterTheme\Migrations;
+
+use P4\MasterTheme\MigrationRecord;
+use P4\MasterTheme\MigrationScript;
+
+/**
+ * Remove the WordPress template editor option from Planet 4 Features.
+ */
+class M034PrePopulateOldPostsArchiveNotice extends MigrationScript
+{
+    /**
+     * Perform the actual migration.
+     *
+     * @param MigrationRecord $record Information on the execution, can be used to add logs.
+     * phpcs:disable SlevomatCodingStandard.Functions.UnusedParameter -- interface implementation
+     */
+    protected static function execute(MigrationRecord $record): void
+    {
+        $cutoff = '10';
+        $title = 'Oldies But Goodies Alert!';
+        $description = "Hey there! Just a quick note: the stuff you're browsing through is mostly for nostalgia and archival kicks. So, before you go basing any big decisions on what you find here, maybe double-check with some fresher content."; // phpcs:ignore Generic.Files.LineLength.MaxExceeded
+        $button = 'Read the latest from ' . get_bloginfo('name');
+        $prefix = 'old_posts_archive_notice_';
+
+        $options = get_option('planet4_options');
+
+        if (!$options) {
+            echo "Error with migration M034PrePopulateOldPostsArchiveNotice. P4 options not found.\n"; // phpcs:ignore
+            return;
+        }
+
+        $options[ $prefix . 'cutoff' ] = $cutoff;
+        $options[ $prefix . 'title' ] = $title;
+        $options[ $prefix . 'description' ] = $description;
+        $options[ $prefix . 'button' ] = $button;
+
+        $result = update_option('planet4_options', $options);
+
+        if ($result) {
+            echo "Migration M034PrePopulateOldPostsArchiveNotice successful\n"; // phpcs:ignore
+        } else {
+            echo "Error with migration M034PrePopulateOldPostsArchiveNotice. P4 options could not be updated.\n"; // phpcs:ignore
+        }
+    }
+}
diff --git a/src/Migrator.php b/src/Migrator.php
index 2294b3af20..4727d1f316 100644
--- a/src/Migrator.php
+++ b/src/Migrator.php
@@ -35,6 +35,7 @@
 use P4\MasterTheme\Migrations\M031MigrateMediaBlockToAudioVideoBlock;
 use P4\MasterTheme\Migrations\M032MigrateSplit2ColumnBlock;
 use P4\MasterTheme\Migrations\M033MigrateSocialMediaTwitterBlockToEmbedBlock;
+use P4\MasterTheme\Migrations\M034PrePopulateOldPostsArchiveNotice;
 
 /**
  * Run any new migration scripts and record results in the log.
@@ -87,6 +88,7 @@ public static function migrate(): void
             M031MigrateMediaBlockToAudioVideoBlock::class,
             M032MigrateSplit2ColumnBlock::class,
             M033MigrateSocialMediaTwitterBlockToEmbedBlock::class,
+            M034PrePopulateOldPostsArchiveNotice::class,
         ];
 
         // Loop migrations and run those that haven't run yet.
diff --git a/src/Post.php b/src/Post.php
index 1260c67689..c911e07c42 100644
--- a/src/Post.php
+++ b/src/Post.php
@@ -3,6 +3,7 @@
 namespace P4\MasterTheme;
 
 use Timber\Post as TimberPost;
+use P4\MasterTheme\Features\OldPostsArchiveNotice;
 use WP_Block;
 use WP_Error;
 
@@ -518,4 +519,36 @@ public function get_locale(): string
 
         return $post_locale ?? $site_locale;
     }
+
+    /**
+     * Get the content for the old posts archive notice.
+     *
+     */
+    public function get_old_posts_archive_notice(): array
+    {
+        $prefix = 'old_posts_archive_notice_';
+        $post_date = get_post_field('post_date', $this->id);
+        $options = get_option('planet4_options');
+        $notice_cutoff = isset($options[$prefix . 'cutoff']) ? $options[$prefix . 'cutoff'] : null;
+        $activate = OldPostsArchiveNotice::is_active();
+
+        if ($options && $post_date && $notice_cutoff && $activate) {
+            $post_publish_year = (int) date('Y', strtotime($post_date));
+            $current_year = (int) date('Y');
+
+            return array(
+                "show_notice" => ($current_year - $post_publish_year) >= (int) $notice_cutoff,
+                "title" => $options[$prefix . 'title'] ?? '',
+                "description" => $options[$prefix . 'description'] ?? '',
+                "button" => $options[$prefix . 'button'] ?? '',
+            );
+        }
+
+        return array(
+            "show_notice" => false,
+            "title" => '',
+            "description" => '',
+            "button" => '',
+        );
+    }
 }
diff --git a/src/Settings.php b/src/Settings.php
index 21eb1ecb20..86498d0aa0 100644
--- a/src/Settings.php
+++ b/src/Settings.php
@@ -173,6 +173,31 @@ public function __construct()
                             'media_buttons' => false,
                         ],
                     ],
+
+                    [
+                        'name' => __('Old Posts Archive notice cutoff years', 'planet4-master-theme-backend'),
+                        'id' => 'old_posts_archive_notice_cutoff',
+                        'type' => 'text',
+                        'desc' => __('Condition to determine when to show the notice, in years.<br>Any Post older than that will have the notice displayed on the top.', 'planet4-master-theme-backend'),
+                    ],
+
+                    [
+                        'name' => __('Old Posts Archive notice title', 'planet4-master-theme-backend'),
+                        'id' => 'old_posts_archive_notice_title',
+                        'type' => 'text',
+                    ],
+
+                    [
+                        'name' => __('Old Posts Archive notice description', 'planet4-master-theme-backend'),
+                        'id' => 'old_posts_archive_notice_description',
+                        'type' => 'textarea',
+                    ],
+
+                    [
+                        'name' => __('Old Posts Archive button text', 'planet4-master-theme-backend'),
+                        'id' => 'old_posts_archive_notice_button',
+                        'type' => 'text',
+                    ],
                 ],
             ],
             'planet4_settings_cookies_text' => [
diff --git a/src/Settings/Features.php b/src/Settings/Features.php
index 5454739ba3..b92ae99d17 100644
--- a/src/Settings/Features.php
+++ b/src/Settings/Features.php
@@ -11,6 +11,7 @@
 use P4\MasterTheme\Features\LazyYoutubePlayer;
 use P4\MasterTheme\Features\RedirectRedirectPages;
 use P4\MasterTheme\Features\Planet4Blocks;
+use P4\MasterTheme\Features\OldPostsArchiveNotice;
 use P4\MasterTheme\Loader;
 use P4\MasterTheme\Settings;
 use CMB2;
@@ -99,6 +100,7 @@ public static function all_features(): array
             LazyYoutubePlayer::class,
             RedirectRedirectPages::class,
             Planet4Blocks::class,
+            OldPostsArchiveNotice::class,
 
             // Dev only.
             DisableDataSync::class,
diff --git a/templates/single.twig b/templates/single.twig
index f328585bbc..fe1f62adff 100644
--- a/templates/single.twig
+++ b/templates/single.twig
@@ -79,6 +79,22 @@
                     </div>
                 </div>
                 {% include "blocks/share_buttons.twig" with {social:post.share_meta, utm_medium: 'share'} %}
+
+                {% if old_posts_archive_notice.show_notice %}
+                    <div class="single-post-old-posts-archive-notice">
+                        {% if ( old_posts_archive_notice.title ) %}
+                            <h4>{{ old_posts_archive_notice.title|e('wp_kses_post')|raw }}</h4>
+                        {% endif %}
+                        {% if ( old_posts_archive_notice.description ) %}
+                            <p>{{ old_posts_archive_notice.description|e('wp_kses_post')|raw }}</p>
+                        {% endif %}
+                        {% if ( old_posts_archive_notice.button ) %}
+                            <a class="btn btn-secondary" href="{{ fn('get_term_link', page_term_id) }}">
+                            {{ old_posts_archive_notice.button|e('wp_kses_post')|raw }}
+                            </a>
+                        {% endif %}
+                    </div>
+                {% endif %}
             </header>
         </div>