Yes, “today is _that_ day”:http://news.bbc.co.uk/onthisday/hi/dates/stories/october/4/newsid_2685000/2685115.stm. And you can make your very own “*Sputnik in a Biscuit Tin*”:http://news.bbc.co.uk/2/hi/uk_news/magazine/7049002.stm to celebrate.