The unavailable_after robots directive instructs Google to stop showing a page in search results after a specified date and time, expressed in a recognised date format such as RFC 850 or ISO 8601. It is delivered via the meta robots tag (for example, content=“unavailable_after: 2025-12-31T23:59:59Z”) or the X-Robots-Tag HTTP header. The directive is intended for time-limited content — event pages, limited-period offers, or dated press releases — where the publisher wants the page to drop out of results automatically without needing to manually add a noindex or delete the page afterwards. Google honours the directive from approximately the specified time, though the exact timing of removal from results depends on the crawl cycle. The page continues to be crawlable after the date; the directive only suppresses its appearance in results. It does not affect other crawlers unless they also implement the directive.