That feature exists since years. Here's a submission from 2 years ago: <a href="https://news.ycombinator.com/item?id=13219727" rel="nofollow">https://news.ycombinator.com/item?id=13219727</a>
Hi, OP here. Hacker News now permits you to go back to front page of any date.<p>Interesting to note how Front page was on the day of Steve Job's demise.