Legality of Cannabis by U.S. Jurisdiction United States portal This category is for Washington, D.C. in the year 1870 18651866186718681869187018711872187318741875 1820s1830s1840s1850s1860s1870s1880s1890s1900s1910s1920s See also: Timeline of Washington, D.C. Subcategories This category has only the following subcategory. / 1870 establishments in Washington, D.C. (5 P)