Deja vu? I saw these comments three days ago but they show as being from today. @dang seems like something is wonky? The comments correctly show as 3 days old in the commenters' histories.
Usually via the second chance pool. The timestamp of the post and earlier comments are reset to a current time (probably to game HN’s own ranking system) and new comments will have correct timestamps. After a while all the times go back to their correct ones.
Selecting “past” at the top of this submission can confirm this. It shows this submission with the same submitter, score, and number of comments but dated 4 days ago.
