Include dateModified and Freshness Timestamps

Also known as: Content Date Signaling, Last Updated Timestamps, Freshness Metadata

Add visible 'Last updated' dates and dateModified schema to key content when it really changes; some AI assistants cite fresher pages (Ahrefs, 2025).

What is Include dateModified and Freshness Timestamps?

Impact Mechanism:
RAG & Retrieval
Category:
Technical & Schema
Effort:
Low
Skill needed:
Technical & Dev
Evidence level:
Proven

How does it work?

  1. 1. Show a labelled date near the title

    Display 'Published' and/or 'Last updated' with a full date prominently on each article.

  2. 2. Add datePublished and dateModified

    In Article or BlogPosting JSON-LD, set datePublished and dateModified in ISO 8601 with a timezone, e.g. 2026-11-10T09:00:00+01:00.

  3. 3. Keep visible and markup dates equal

    Use the same dates in text and markup, remove other confusing dates, and never use event or future dates.

  4. 4. Change dates only for real updates

    Update dateModified only after substantial content changes; refreshing dates on unchanged content is a warning sign to Google.

  5. 5. Sync the sitemap lastmod

    Set <lastmod> to the last significant update; Google uses it only when it is consistently and verifiably accurate.

  6. 6. Validate with the Rich Results Test

    Test the URL in the Rich Results Test to confirm the Article dates parse, and check they match the visible date.