Existing comment:
Income Tax Day
The Civil War prompted the first national income tax in the United States, which ended in 1872. Prior to the ratification of the 16th Amendment in 1913, which permanently established the income tax, most revenue had come from tariffs (import taxes). In 1955, tax day was changed to April 15 to provide more time to file.
Poster encouraging early filing of income taxes, circa 1945, Records of the Office of Government Reports |