About HN History
I created HN History, because I too often remember seeing something interesting on HN x days ago (where x is known) and wanted to share it with someone, but was unable to find it again, because HN is fluid.
All information gathered comes from HN's RSS feed. It's a little limiting. It does not provide the points of the post, or the OP. For now the RSS will do, if this is of use to anyone other than myself, I might expand to parse the actual website.
You can find its source on GitHub.
What's with the 'Actual Date' ?
If a date beyond HN History is selected, it returns the lastest HN History grabbed.
If a date before HN History was created(April 13th, 2014) is selected, it returns the first of the HN History.