Update Date — nullvuild

An update date is the visible date that tells readers when a page, policy, article, or dataset was last changed.

For source checking, the update date is not just decoration. It helps readers know whether a claim came from the page as it appears today, from an earlier version, or from a summary that may already be stale. Government pages, product policies, help-center articles, and public datasets often change without a full new article. A citation that ignores the update date can make an old summary look current.

A useful source note records the page title, publisher, URL, access date, and update date when the page shows one. If the page has both a published date and an updated date, keep both. The published date explains when the record began; the update date explains when the visible wording may have changed.

The boundary is important. An update date does not prove what changed. It only says the page reports an update. If the exact change matters, compare archived versions, release notes, correction notes, or diff tools before writing that a specific sentence changed on that date.

Practical interpretation: when a page is likely to change again, put the update date in the first source note instead of burying it at the end. That lets a later reader decide whether to re-check the page before reusing the summary.

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