Check the page itself first

Most websites print a publish date or last update date somewhere on the page. Look at the top of the article, near the author's name, or at the bottom of the page in the footer. The date might say "Published" or "Updated" or just show a date with no label. On news sites and blogs, this is almost always visible. On other pages — product pages, company information, how-to guides — the date may be smaller or harder to spot.

If you see both a publish date and an update date, the update date tells you when the information was last checked or changed. A page published in 2019 but updated last month is more current than the original date suggests. If you only see one date, that is usually the publish date, and you cannot tell from the page itself whether it has been updated since.

Use the Internet Archive to see older versions

The Wayback Machine at archive.org saves snapshots of websites as they appeared on past dates. Go to archive.org, paste the website address into the search box, and press Enter. You will see a calendar showing which dates the site was captured. Click a date to see what the page looked like on that day.

This tool is useful when you want to know whether a page has changed, or when you need to see what a website said before it was updated or deleted. The Wayback Machine does not capture every website or every date — it depends on how popular the site is and whether the site owner blocked it — but it covers most major websites and many smaller ones.

Key Takeaways

  • Published or updated dates are usually printed on the page itself, near the top or bottom, though some websites hide them or do not include them.
  • An update date is more recent than a publish date and tells you the page has been checked or changed since it was first posted.
  • The Wayback Machine at archive.org lets you see what a website looked like on past dates, which helps you track whether and when a page changed.
  • Not every website is captured by the Wayback Machine, and some site owners block it, so older snapshots may not be available.

Check the page source code for hidden dates

Every webpage contains code behind what you see on screen. Some websites store date information in this code even if they do not display it on the page. To look at the code, right-click anywhere on the page and select "View Page Source" (in Chrome, Firefox, and Edge) or "View Source" (in Safari). A new window will open showing the code.

Search the code for the word "date" or "published" using Ctrl+F (or Cmd+F on Mac). You may find a date in a format like "2024-01-15" or "January 15, 2024". Not all websites include this information, and the code can be hard to read if you are not familiar with it, but it is worth checking if the page itself shows no date.

Look at the file properties on your computer

If you have downloaded a document or image from a website, you can check when it was created or modified. Right-click the file on your computer and select "Properties" (Windows) or "Get Info" (Mac). A window will show the date the file was created and the date it was last changed. This tells you when the file was made, though it may not match the website's publish date if the file was updated separately.

This method works for PDFs, images, Word documents, and other files you have saved. It does not work for web pages you have only viewed in your browser — you need the actual file downloaded to your computer.

Understand why dates matter and when they do not

A recent date does not always mean the information is correct, and an old date does not always mean it is wrong. A page updated last week might contain outdated information if the writer did not check the facts. A page from five years ago might still be accurate if the topic has not changed. What matters is whether the information matches what you can verify from other sources.

For news, health information, software instructions, and legal details, a recent date is important because these topics change. For historical information, definitions, or explanations of how something works, an older date may not matter. Use the date as one piece of information, not the only piece.

What to do when a page has no date

Some websites do not include dates at all. If you cannot find a date on the page, in the code, or in the Wayback Machine, look for other clues: references to current events, mentions of product versions, or links to other pages that have dates. You can also check when the domain was registered using a WHOIS lookup tool, though this tells you when the website started, not when this particular page was written.

If the information matters to your decision — whether you are buying something, following health information, or learning about a current event — contact the website owner and ask when the page was published. Most websites have a contact form or email address. A site that will not tell you when its information was posted is a sign to look elsewhere.

Frequently Asked Questions

Why do some websites not show a publish date?

Some site owners believe dates make pages look old or worry readers will dismiss older content. Others update pages so frequently they do not want to highlight when they were first written. A few websites straightforward do not include dates in their design. If a date matters to you, it is fair to be skeptical of a site that hides it.

Is the Wayback Machine always accurate?

The Wayback Machine shows what it captured, but it does not capture every website or every date. Some sites block it, and others are too new or too small to be captured regularly. The snapshots are accurate to what the page looked like on that date, but gaps in the calendar mean you may not see every version.

Can I trust a page that was updated recently?

A recent update date means someone checked the page, but it does not may provide the information is correct. The update might have been a small fix, a formatting change, or a full rewrite. Always check the facts against other sources, regardless of the date.

What does "last modified" mean compared to "published"?

Published is when the page was first written. Last modified or updated is when someone made a change to it. If both dates appear, the modified date is more recent and tells you the page has been reviewed or changed since it was first posted.