Wikipedia:Selected anniversaries/June 28
- 1880 - Australian outlaw and folk hero Ned Kelly was captured in Glenrowan, Victoria.
- 1914 - Archduke Franz Ferdinand of Austria was killed by Serb nationalist Gavrilo Princip in the Assassination in Sarajevo, catalysing the outbreak of World War I.
- 1919 - The Treaty of Versailles was signed, ending World War I.
- 1978 - The United States Supreme Court, in Regents of the University of California v. Bakke 438 US 265 1978, barred quota systems in college admissions but affirmed the constitutionality of programs giving advantage to minorities.
- 1990 - Paperback Software, a company founded by Adam Osborne, was found guilty by a U.S. court of copyright violation for copying the appearance and menu system of Lotus 1-2-3 in its competing spreadsheet program.