What is today 30 May in World History?

 Here are some significant events that happened on May 30 in world history:

• 1431: Joan of Arc, the peasant girl who led the French army to victory over the English during the Hundred Years' War, is burned at the stake for heresy.
• 1868: Decoration Day, the forerunner of Memorial Day, is celebrated for the first time in the United States.
• 1889: The brassiere is invented by Herminie Cadolle.
• 1911: The first Indianapolis 500 is held.
• 1967: The Republic of Biafra is proclaimed in southeastern Nigeria.
• 1971: NASA launches Mariner 9, the first satellite to orbit Mars.
• 1982: Spain joins NATO.
• 1989: The "Goddess of Democracy" statue is unveiled in Tiananmen Square by student demonstrators in Beijing, China.
• 1990: Croatian Parliament is constituted after the first free, multi-party elections.
• 1998: An earthquake measuring 6.5 on the Richter scale strikes northern Afghanistan, killing an estimated 4,000 to 4,500 people.

These are just a few of the many significant events that have happened on May 30 throughout history. It is a day to remember the sacrifices made by those who have fought for freedom and progress, and to celebrate the rich diversity of our world.