Google's research blog does not seem to provide this, but many blogs include the Open Graph metadata[0] around when the article was published or modified:

Google's research blog does not seem to provide this, but many blogs include the Open Graph metadata[0] around when the article was published or modified: article:published_time - datetime - When the article was first published. article:modified_time - datetime - When the article was last changed. For example, I pulled up a random article on another website, and found these <meta> tags in the <head>: <meta property="article:published_time" content="2025-01-11T13:00:00.000Z"> <meta property="article:modified_time" content="2025-01-11T13:00:00.000Z"> For pages that contain this metadata, it would be a cheaper/faster implementation than using an LLM, but using an LLM as a fallback could easily provide you with the publication date of this Google article. [0]: https://ogp.me/ https://ogp.me/