1873
Levi Strauss and Jacob Davis receive a U.S. patent for blue jeans with copper rivets.
AI analysis
读：Levi Strauss and Jacob Davis, two entrepreneurs, received a U.S. patent for blue jeans with copper rivets on May 20, 1873. This invention revolutionized the clothing industry and made Levi's jeans a household name. --来自AI解读
1902
Cuba gains independence from the United States.
AI analysis
读：On May 20, 1902, Cuba officially gained independence from the United States after being under U.S. control since the Spanish-American War. This marked a significant milestone in Cuba's history and led to the establishment of the Republic of Cuba. --来自AI解读
1927
Charles Lindbergh begins the first solo non-stop transatlantic flight.
AI analysis
读：Charles Lindbergh, an American aviator, began his historic solo non-stop transatlantic flight on May 20, 1927. He flew from New York to Paris, covering over 3,600 miles in 33 hours and 30 minutes, marking a significant achievement in aviation history. --来自AI解读
1940
The first prisoners arrive at a new concentration camp at Auschwitz.
AI analysis
读：On May 20, 1940, the first prisoners arrived at Auschwitz, a new concentration camp established by the Nazis in Poland. Over the next five years, millions of people, mostly Jews, were imprisoned, tortured, and killed at Auschwitz, making it one of the most notorious symbols of the Holocaust. --来自AI解读
1961
A white mob attacks civil rights demonstrators in Montgomery, Alabama.
AI analysis
读：On May 20, 1961, a group of civil rights demonstrators, known as the Freedom Riders, were attacked by a white mob in Montgomery, Alabama. The incident drew national attention to the racial tensions and violence faced by African Americans during the Civil Rights Movement. --来自AI解读
1996
The Supreme Court of the United States rules in Romer v. Evans against an amendment that would have prevented any city, town or county in the state of Colorado from taking any legislative, executive, or judicial action to protect the rights of individuals based on their homosexuality, bisexuality, or transsexuality.
AI analysis
读：In 1996, the Supreme Court ruled in favor of the plaintiffs in Romer v. Evans, striking down a Colorado constitutional amendment that prohibited local governments from protecting the rights of LGBTQ individuals. This landmark decision marked a significant step forward for LGBTQ rights in the United States. --来自AI解读
2002
The independence of East Timor is recognized by the international community.
AI analysis
读：On May 20, 2002, East Timor officially gained independence from Indonesia, ending a long period of occupation and conflict. The international community recognized East Timor as a sovereign state, marking a new chapter in its history. --来自AI解读
2013
An EF5 tornado devastates Moore, Oklahoma, killing 24 people, including ten children.
AI analysis
读：On May 20, 2013, a devastating EF5 tornado struck Moore, Oklahoma, causing widespread destruction and loss of life. The tornado resulted in the deaths of 24 people, including ten children, and highlighted the importance of disaster preparedness and emergency response efforts. --来自AI解读
2014
More than 118 people are killed in two bombings in Jos, Nigeria.
AI analysis
读：On May 20, 2014, two bombings occurred in Jos, Nigeria, resulting in the deaths of over 118 people. The attacks were attributed to the terrorist group Boko Haram and underscored the ongoing security challenges facing Nigeria. --来自AI解读
2019
The International System of Units (SI) is updated to define seven base units in terms of physical constants.
AI analysis
读：On May 20, 2019, the International System of Units (SI) was updated to redefine seven base units in terms of physical constants. This change aimed to make the system more precise and consistent, reflecting advancements in scientific knowledge and technology. --来自AI解读
