From d6df16b22262b257ebe8f870581bf1975f5cbeca Mon Sep 17 00:00:00 2001
From: David Karlsson <35727626+dvdksn@users.noreply.github.com>
Date: Tue, 20 Oct 2026 14:36:06 +0000
Subject: [PATCH] fix: omit zero lastmod dates from sitemap

Generated reference pages without modification dates appeared in the sitemap with lastmod set to 0001-01-01. Only render lastmod when the page has a nonzero date.
---
 layouts/sitemap.xml | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/layouts/sitemap.xml b/layouts/sitemap.xml
index 0c8f565eff..9d56679e95 100644
--- a/layouts/sitemap.xml
+++ b/layouts/sitemap.xml
@@ -10,7 +10,9 @@
     {{- if ne .Params.sitemap false }}
       <url>
         <loc>{{ .Permalink}}</loc>
+        {{- if not .Lastmod.IsZero }}
         <lastmod>{{ .Lastmod | time.Format "2006-01-02" }}</lastmod>
+        {{- end }}
         <changefreq>monthly</changefreq>
         <priority>0.5</priority>
       </url>