I've seen HN do this once before. It took a post from a day ago and changed all the timestamps to be "current time minus a few minutes". It was this thread [1], specifically the first two comments in this subthread [2] had their timestamps faked. The third comment is from after it had been resurrected with the fake timestamps.
On both threads it says 4 hours ago. I thought I was going insane because I remember googling Netmaker at the time, and it definitely wasn't today. Clicking into their profile shows the comment '1 day ago'
