Wikipedia:Selected anniversaries/April 28
April 28: International Workers' Memorial Day
- 1192 - Third Crusade: Conrad of Montferrat, the elected King of Jerusalem, was assassinated by the Hashshashin.
- 1789 - Fletcher Christian led a mutiny aboard HMAV Bounty against Commander William Bligh (pictured).
- 1923 - Wembley Stadium, then known as Empire Stadium, was opened to the public for the first time and held the 1923 FA Cup Final between Bolton Wanderers and West Ham United football clubs.
- 1952 - The Treaty of San Francisco entered into force, ending the occupation of Japan by the former Allied Powers of World War II.
- 2001 - Dennis Tito became the world's first fee-paying space tourist, riding the Soyuz TM-32 spacecraft to the International Space Station.