18641936

18641936 denotes the chronological span from 1864 to 1936. In historiography and biographical indexing, such compact date notations are used to refer to a period rather than a single year and, when hyphenated or spaced, can indicate the lifespan of a person born in 1864 and died in 1936.

The period covers the latter part of the 19th century and the interwar era. It includes the tail end of the Second Industrial Revolution, rapid globalization, and the rise of modern states. It also encompasses conflict and upheaval: the remainder of the 19th century saw imperial expansion and reform movements; World War I (1914–1918) reshaped borders and societies; the Russian Revolution of 1917; the postwar settlement and the 1920s' social changes; and the onset of the Great Depression in 1929 followed by political radicalization and the early 1930s constitutional crises in several countries. The year 1936 itself saw events such as the Berlin Olympics and the growing tensions leading to broader conflicts, with the Spanish Civil War beginning in 1936.

In data sets and timelines, 18641936 serves as a shorthand boundary for analyzing long-term trends in politics, economics, science, and culture across multiple regions. It is not a universally fixed convention and may be used differently depending on the subject.