Day Book may refer to:

• The Day Book, a newspaper in Chicago 1911–1917
• Weekly Day Book, a newspaper which primarily existed to propagate white supremacist ideas, 1848–1879
• General journal, or day book
  • a day book in bookkeeping

See also

• Diary, a record reporting on what has happened over the course of a day
• Commonplace book, a way to compile knowledge, usually by writing information into books

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