Three things in the atlas are tied to this date. Each is placed here by a source that gives the day.
After a violent thunderstorm on 17 August 1887, a round lump of iron about two inches across turned up in a Brixton garden. The chemist who tested it could not match it to meteorites.
A nightclub in Kentucky said to be haunted, with ghost stories tied to an 1850 slaughterhouse on the site and to the 1896 murder of Pearl Bryan. Researchers found no record supporting the legends.
A rumour that the Poltergeist films were cursed, built on the early deaths of Dominique Dunne in 1982 and Heather O'Rourke in 1988, two young members of the cast.