Against the Day is a 2006 historical novel by Thomas Pynchon. The narrative takes place between the 1893 Chicago World's Fair and the time immediately following World War I and features more than a hundred characters spread across the United States, Europe, Mexico, Central Asia, and "one or two places not strictly speaking on the map at all," according to the book jacket blurb written by Pynchon. Like its predecessors, Against the Day is an example of historiographic metafiction or metahistorical romance. At 1,085 pages it is the longest of Pynchon's novels to date.