Access the Tumblr site with the post you want to view. Check for a timestamp at the base of the post. If you don’t see a timestamp, click the “Notes” link to view the comments. The timestamp usually displays on the Notes page. Sometimes you can also click the picture in the post to open a new page that features the post along with a timestamp. Click one of the tags on the post you want to view, and then append “/chrono” (without the quote marks) to the end of the URL to view the posts in chronological order. This displays the post with the oldest timestamp first. Writer Bio

How to Find a Timestamp in Tumblr - 53