Dates from LinkedIn posts are not parsed correctly. LinkedIn only shows how long ago a given post was created, and it seems to result in Reader just using that for determining the publication date. For instance, for a post that shows "2 years ago" that was saved to Reader on August 19, 2025, Reader would use August 19, 2023 as the post creation date.

Extraction of the exact date is possible, though, as there are websites out there that allow one to paste the link of a LinkedIn post and retrieve the publication date.