April 2, 1513: Explorer Juan Ponce de León claims Florida for Spain as the first known European to reach Florida.

April 4, 1968: US civil rights activist Martin Luther King Jr. assassinated in Memphis, Tennessee.

April 4: In the Christian Faith, Easter Sunday is one of the highest holy days of the year and commemorates Jesus’ resurrection. The week leading up to Easter is Holy Week or La Semana Santa and involves solemn processions, prayer, masses and other preparation for Jesus’ rebirth on Easter.

April 6: Scottish Americans celebrate National Tartan Day. This celebration highlights the contributions Scottish Americans have made to US democracy, industry and society. April 6th is also the anniversary of the 1320 Declaration of Arbroath (Scottish Independence) and according to the U.S. Senate Resolution 155, the Declaration of Arbroath was a model for the Declaration of Independence.

April 10, 1998: The Good Friday/Belfast Agreement for Northern Ireland is signed by the British and Irish governments.

April 12: Hindu New Year.

April 13: Equal Pay Day, an attempt to raise awareness about the raw wage gap, the figure that shows that women, on average, earn about 80 cents for every dollar men earn. The date moves earlier each year as the wage gap closes. Equal Pay Day began in 1996 by the National Committee on Pay Equity as a public awareness event to illustrate the gender pay gap.

April 15:  is Jackie Robinson Day, a traditional event which occurs annually in Major League Baseball, commemorating and honoring the day Jackie Robinson made his major league debut. April 15 was Opening Day in 1947, Robinson’s first season in the Major Leagues. Initiated for the first time on April 15, 2004,

April 16: Emancipation Day, a holiday in Washington DC to mark the anniversary of the signing of the Compensated Emancipation Act, which president Abraham Lincoln signed on April 16, 1862. It freed more than 3000 slaves in the District of Columbia.

April 15-16: Holocaust Remembrance Day - Congress established the Days of Remembrance as the nation’s annual commemoration of the Holocaust.

April 16-17: Yom Ha’Atzmaut, national Independence Day in Israel.

April 17, 1961: 1,400 Cuban exiles land in Bay of Pigs in an attempt to overthrow Fidel Castro.

April 19: Landing of the 33 Patriots Day (Uruguay). Anniversary of the landing of thirty-three exiles in 1825, who began a campaign leading to Uruguay’s independence.

April 19-27: Passover or Pesach is an eight-day long celebration during which Jewish families traditionally commemorate the deliverance of the Jews from slavery in Egypt. The highlight of the Passover celebration is the ceremony of Seder performed on the first two evenings of Passover.

April 22, 1500: Pedro Álvares Cabral is the first European to discover Brazil, landing near Monte Pascoal, claims it for Portugal.

April 22: Earth Day promotes world peace and sustainability of the planet. Events are held globally to show support of environmental protection of the Earth.

April 24, 1898: Spanish-American War - Spain declares war after rejecting US ultimatum to withdraw from Cuba.

April 29, 1945: US Army liberates 31,601 in Nazi concentration camp in Dachau, Germany.

April 30, 1562: 1st French colonists in North America, Jean Ribault & colonists arrive in Florida.