Tumblr shows posts as “5 hours ago” or “a year ago” instead of the actual date. Paste a recent public post URL to get the exact publish date and time.
We look the post up in the blog's public RSS feed. No Tumblr login, and we never download the post's page.
Tumblr only shows you 'X days ago'. We read the post's publish time from the blog's feed, accurate to the second.
Every public Tumblr blog publishes an RSS feed. We look your post up in it, so we never download or parse the post's page.
A blog's feed lists its most recent posts, so older posts can't be found this way. When yours isn't there, we tell you how far back the feed goes.
Each blog's feed is cached for 10 minutes so we're not hitting Tumblr unnecessarily. Per-IP rate limits keep things polite.
Tumblr's web UI shows relative dates ('5 hours ago', '2 weeks ago') instead of exact timestamps. A blog's public RSS feed includes the exact publish time of each recent post, and this tool reads it from there.
The date comes from the blog's public RSS feed, and a feed only lists a blog's most recent posts. If the post you paste is older than that, it isn't in the feed and we can't read its date. The tool shows how far back the feed goes, so you can see the post was published before then, unless it was removed.
Three common reasons: (1) Citation and attribution — quoting a Tumblr post in writing or research. (2) Archiving — knowing when something was published before it disappears. (3) Fact-checking — verifying when a post was written, since reblogs make it hard to tell.
It returns the date of the post you paste — meaning the date that specific reblog was published on that blog, not the date of the original post. To get the original post's date, click through to the source on Tumblr and paste that URL instead.
Both work: `https://changes.tumblr.com/post/123456789` and `https://www.tumblr.com/changes/123456789`. The post ID alone is the unique identifier; titles and slugs are optional.
A few reasons: the post is older than the blog's recent feed, the blog hides itself from logged-out visitors, the post was deleted, or the blog has no public feed.
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