I also made a bookmarklet to show me HN posts from random dates, it is quite interesting to see what was interesting to people a decade ago, for example. Lots of comments in HN's heyday were pretty eye opening as well.
javascript:(function() {function randomDate(start, end) {var date = new Date(+start + Math.random() \* (end - start));var day = ("0" + date.getDate()).slice(-2);var month = ("0" + (date.getMonth() + 1)).slice(-2);var year = date.getFullYear();return year + '-' + month + '-' + day;}var startDate = new Date(2007, 9, 9);var endDate = new Date();var randomDateStr = randomDate(startDate, endDate);var newUrl = 'https://news.ycombinator.com/front?day=' + randomDateStr;window.location.href = newUrl;})();