Tumblr Post Date Finder

Instructions

1. Find a Tumblr post you want to check.
2. Copy the post URL from your browser's address bar.
3. Paste the URL above and click "Run" to get the post date.

Example URL: https://example.tumblr.com/post/123456789/my-post-title

How does it work?

This tool extracts the exact publication date embedded in the metadata of a Tumblr post. Tumblr includes a parsely-pub-date meta tag in each post's HTML source, and that tag holds the precise timestamp of when the post was created.

The tool fetches the post's public page, reads the date out of that meta tag, and converts it into a Unix timestamp plus a readable UTC date.

The page is fetched anonymously, so the tool sees what any logged-out visitor sees. Public posts on standard Tumblr themes resolve fine. Posts on private or password-protected blogs, deleted posts, and blogs whose custom theme strips the parsely-pub-date tag won't return a date — there's nothing in the page source to read.

Tumblr post date: what you get

Results come back as a JSON block above with two fields:

Both describe the same instant in UTC. The raw createdUtc value is there so you can drop it into a spreadsheet or script and convert it to whatever timezone you need.

What can you do with the Tumblr Post Date Finder?

Whether you're researching viral content, verifying post timelines, or conducting a digital investigation, knowing the exact date a Tumblr post was published is valuable.

• OSINT investigations — for open-source intelligence gathering, exact post dates provide critical timeline evidence.
• Content verification — verify when content was originally posted to confirm its relevance and authenticity.
• Legal evidence — knowing the exact date of a post can serve as crucial evidence in legal cases and disputes.
• Journalistic research — journalists can confirm when content first appeared, keeping reporting and timelines accurate.
• Academic citations — researchers and students can reference Tumblr posts with precise date and time stamps.
• Digital archiving — archivists and historians can keep precise records of online content and discussions.

Working in UTC keeps things unambiguous when you're coordinating across time zones or comparing events chronologically. We don't store or share the URLs you enter; they're used solely to retrieve the creation date for you.

Frequently asked questions

When was this Tumblr post made?

Paste the post's URL above and you'll get the exact second it was published, rather than the relative age Tumblr displays.

Can I check the date of someone else's post?

Yes. Any publicly viewable post works — the tool only reads what the blog already publishes, and you don't need to be logged in.

Does it work on custom Tumblr domains?

Yes. Blogs on a custom domain still serve the same post metadata as *.tumblr.com blogs, provided the theme includes the parsely-pub-date meta tag.

Why can't it find the date for a post?

The post has to be publicly readable and its page has to include the parsely-pub-date meta tag. Private blogs, password-protected blogs, deleted posts, and heavily customized themes that drop that tag can't be resolved. Check that the URL opens in a logged-out browser window.

Does a reblog show its own date or the original's?

A reblog is its own post with its own URL, so you get the date that reblog was published. To date the original, paste the original post's URL.

What timezone is the result in?

UTC. The formatted dateUTC field carries a GMT suffix, which is the same instant. Use the raw createdUtc timestamp to convert to a local timezone.