Access date — nullvuild

An access date is the date when a reader, researcher, or editor last checked a source directly.

It matters most when the source can change without becoming a new document. Pricing pages, help-center articles, product policies, eligibility rules, public datasets, app store listings, and government guidance can keep the same URL while the wording, amount, deadline, or supported region changes. Without an access date, a later reader cannot tell whether the summary reflects the page as it looked today or an older version.

A useful source note separates the access date from the published date and the updated date. The published date says when the source first appeared. The updated date says when the publisher claims the visible page changed. The access date says when the writer personally saw the page. These dates answer different questions and should not be collapsed into one vague “date.”

The boundary is that an access date does not prove the source was correct. It only proves the timing of the check. If the claim is important, the note may also need an archive link, version number, dataset release, or quotation of the exact sentence used.

Practical interpretation: add access dates to live web pages that affect a decision, citation, comparison, deadline, policy, price, or recommendation. Stable books, DOI-backed papers, and fixed PDFs may not need the same emphasis unless the cited landing page is volatile.

Access date source note 2026

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Access date source note 2026

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