Mark blogs older than a year as outdated

data/i18n/en/en.toml

@@ -202,6 +202,14 @@ other = "Objectives"
 [options_heading]
 other = "Options"
 
+[outdated_page_message]
+other = "Kubernetes authors consider this page to be outdated because REASON. We suggest that you use more recent resources."
+[outdated_page_reason]
+other = "it is more than a year old"
+
+[outdated_page_title]
+other = "Outdated page"
+
 [post_create_issue]
 other = "Create an issue"
 

layouts/partials/deprecation-warning.html

@@ -9,4 +9,15 @@
     </p>
   </div>
 </section>
+{{ else if and (eq .Section "blog") .Date (.Date.Before (now.AddDate -1 0 0)) -}}
+{{ $title := .Param "outdated_page.title" | default (T "outdated_page_title") -}}
+{{ $msg := .Param "outdated_page.message" | default (T "outdated_page_message") -}}
+{{ $reason := .Param "outdated_page.reason" | default (T "outdated_page_reason") -}}
+{{ $msg = replaceRE "REASON" $reason $msg -}}
+<section id="deprecation-warning">
+  <div class="content deprecation-warning pageinfo">
+    <h3>{{ $title }}</h3>
+    <p> {{ $msg }}</p>
+  </div>
+</section>
 {{ end }}