Hacker News Time Machine

hn_time_machine.js

var t = new Date();
t.setFullYear(t.getFullYear() - 3);
var past = prompt("HN time machine", t.toISOString().substr(0,10));
if (past != null) {
  var p = new Date(past);
  var p1 = (new Date(p.getFullYear(), p.getMonth(), p.getDate(), 0, 0, 0, 0).getTime() + "").slice(0,-3);
  var p2 = (new Date(p.getFullYear(), p.getMonth(), p.getDate(), 23, 59, 59, 0).getTime() + "").slice(0, -3);
  var u = "https://hn.algolia.com/?query=&sort=byPopularity&prefix&page=0&dateRange=custom&type=story&dateStart=" + p1 + "&dateEnd="+ p2; 
  window.location.href=u;
}