From 2d2f4abe0108bae156d3a08697ff56cd28e9cdd0 Mon Sep 17 00:00:00 2001
From: Brett Hagman <bhagman@roguerobotics.com>
Date: Fri, 10 Apr 2026 16:49:10 -0400
Subject: [PATCH] Fix for outdated/broken sitemap tags - <urlset> tag is
 outdated - fixed - <lastmod> tags are not formatted correctly (see
 https://www.sitemaps.org/protocol.html) - fixed

---
 pelican/plugins/sitemap/sitemap.py | 14 +++-----------
 1 file changed, 3 insertions(+), 11 deletions(-)

diff --git a/pelican/plugins/sitemap/sitemap.py b/pelican/plugins/sitemap/sitemap.py
index 5324279..5320aa8 100644
--- a/pelican/plugins/sitemap/sitemap.py
+++ b/pelican/plugins/sitemap/sitemap.py
@@ -11,10 +11,7 @@
 log = logging.getLogger(__name__)
 
 XML_HEADER = """<?xml version="1.0" encoding="utf-8"?>
-<urlset xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
-xsi:schemaLocation="http://www.sitemaps.org/schemas/sitemap/0.9 http://www.sitemaps.org/schemas/sitemap/0.9/sitemap.xsd"
-xmlns:xhtml="http://www.w3.org/1999/xhtml"
-xmlns="http://www.sitemaps.org/schemas/sitemap/0.9">
+<urlset xmlns="http://www.sitemaps.org/schemas/sitemap/0.9">
 """
 
 TXT_URL = "{0}/{1}\n"
@@ -37,13 +34,8 @@
 
 
 def format_date(date):
-    """Format the date in the expected format."""
-    if date.tzinfo:
-        tz = date.strftime("%z")
-        tz = tz[:-2] + ":" + tz[-2:]
-    else:
-        tz = "-00:00"
-    return date.strftime("%Y-%m-%dT%H:%M:%S") + tz
+    """Format the date in the expected format. See: https://www.sitemaps.org/protocol.html."""
+    return date.strftime("%Y-%m-%d")
 
 
 CHANGEFREQ_DEFAULTS = {