On February 14, around the year A.D. 270, Valentine, a holy priest in Rome in the days of Emperor Claudius II, is said to have been executed.

Frederick Douglass, a towering figure of American history, is born enslaved as Frederick Augustus Washington Bailey in 1818 in Talbot County, Maryland. He would go on to make a daring escape North and become one of the most famous people in 19th-century America. As a celebrated orator, author and activist, he became a powerful and eloquent voice not only for the abolition of slavery, but for broader human rights.

Destined to become one of the state’s major exports, the first trainload of oranges grown by Southern California farmers leaves Los Angeles via the transcontinental railroad.

Four men dressed as police officers enter gangster Bugs Moran’s headquarters on North Clark Street in Chicago, line seven of Moran’s henchmen against a wall, and shoot them to death. The St. Valentine’s Day Massacre, as it is now called, was the culmination of a gang war between arch rivals Al Capone and Bugs Moran.

The Soviet Union and the People’s Republic of China, the two largest communist nations in the world, announce the signing of a mutual defense and assistance treaty.

In one of the most caustic literary feuds of the 20th century, playwright Lillian Hellman sues novelist and critic Mary McCarthy for libel, demanding $2.25 million in damages. The case poses the question of where the legal line stands between a critic's free speech and malicious libel.

On February 14, 1988, U.S. speed skater Dan Jansen, a favorite to win the gold medal in the 500-meter race at the 1988 Winter Olympics in Calgary, falls during competition, only hours after learning his sister had died of cancer. Jansen suffered disappointment after disappointment in the Olympics, earning him a reputation as “the heartbreak kid,” before he finally captured an Olympic gold medal in 1994.

At a meeting of the presidents of Nicaragua, Honduras, Guatemala, Costa Rica and El Salvador, the leftist Sandinista government of Nicaragua agrees to free a number of political prisoners and hold free elections within a year; in return, Honduras promises to close bases being used by anti-Sandinista rebels. Within a year, elections in Nicaragua resulted in the defeat of the Sandinistas, removing what officials during the administration of President Ronald Reagan (1981-1989) referred to as a “beachhead of communism” in the Western Hemisphere.

On February 14, 2018, an expelled student entered Parkland, Florida’s Marjory Stoneman Douglas High School and opened fire, killing 17 people and wounding 17 others, in what became at the time the deadliest shooting at a high school in United States history.