> For clean Markdown content of this page, append .md to this URL. For the complete documentation index, see https://buildwithfern.com/learn/llms.txt. ## Last updated frontmatter property writing-content, frontmatter You can now display a "Last updated" message in the page footer using the new `last-updated` frontmatter property. This helps readers know when the content was last modified. ```mdx --- title: API Reference last-updated: December 9, 2025 --- ``` The date is displayed as-is in small text below the on-page feedback, so you can use any date format you prefer. Read the docs ## Footer component for API Reference descriptions api-reference, components, navigation You can now use the `