Maintain accurate lastmod dates to signal page updates reliably.
- Maintain accurate lastmod dates to signal page updates reliably2 cited sources1 category
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Why this matters
Honest and consistent lastmod values help Google prioritize recrawling updated pages.
Hypothetical standard operating procedure
Adapt this example to your site, access, tools, and change process. It is our suggested procedure, informed by the sources below.
- Configure CMS or sitemap generator to update lastmod only on substantial content changes.
- Avoid updating lastmod for minor template or widget changes.
- Use ISO 8601 date format with timezone for lastmod entries.
- Regularly audit sitemaps for lastmod consistency and fix anomalies.
- Monitor crawl stats to confirm updated pages receive timely recrawling.
Watch for
Using sitemap generation date or invalid formats causes Google to ignore lastmod.
Definition of done
Lastmod dates reflect meaningful page changes and use proper W3C datetime format.
Sources & attribution
Original checklist wording and example SOP by Best SEO Checklist, using source-grounded AI assistance. Editorial contact: Ted Kubaitis, @tedkubaitis on Teams. Check current source guidance before implementation.