Wikipedia:Selected anniversaries/June 28
- 1846 – Belgian musician Adolphe Sax patented his design of the saxophone (example pictured).
- 1895 – The U.S. Court of Private Land Claims ruled that James Reavis's claim to 18,600 sq mi (48,000 km2) of land in present-day Arizona and New Mexico was "wholly fictitious and fraudulent".
- 1950 – Korean War: South Korean forces began the Bodo League massacre, summarily executing at least 60,000 suspected North Korean sympathizers.
- 1990 – Paperback Software, a company founded by Adam Osborne, was found guilty of copyright infringement for using Lotus 1-2-3's look-and-feel interface in its own spreadsheet program.