January 18 is the 18th day of the year.
- 1927, Tuesday: Doc and Marty travel to this date from 1991 to retrieve some juniper berries fermented in an old fashion still to cure Einstein of a bacterial infection that Doc Brown humorously called cat-aracts. They also help "Bathtub Jim" McFly get away from Mugsy Tannen.
- 1854, Wednesday: Thomas A. Watson, the assistant of Alexander Graham Bell, who is co-credited with the invention of the telephone, was born.
Community content is available under CC-BY-SA unless otherwise noted.