21
Tiradentes Day: Brazil. This commemorates the excution on this day in 1792 of Jose da Silva Xavier, a leader of the revolt against Portugal.

21
Festival of Ridvan: Bahaii. On the first, ninth, and twelfth day of the Bahaii month of Ridvan (April 21, 29, and May 2), Bahaiis commemorate the declaration of Bahaiuillah in 1863 of his mission as the last messenger of God to the world. Although Bahaiis observe all twelve days, these three days are ones on which they refrain from work. The word iRidvani means paradise, and refers to the garden in Baghdad where Bahaiuillah proclaimed his mission as the prophet of God.

22
J. Robert Oppenheimer (1904-1967): Jewish American. A pioneer in the field of atomic energy, Oppenheimer was director of the Los Alamos laboratory where the first atomic bomb was developed during World War II. Troubled by the use of science to produce weapons of mass destruction, Oppenheimer joined other scientists in refusing to work on developing the even more powerful hydrogen bomb.

24
Genocide Memorial Day. Armenia. This day, also known as Armenian Martyrs Day, commemorates the massacre of Armenians by the Ottoman Turks in 1915-1916. Most Armenians living in the United States are the children or grandchildren of survivors of the genocide. This day has been chosen to commemorate this tragic event since on this day in the 1915 many of Armenia's leading politicians, writers, and professionals in Constantinople were deported and/or killed.

25
Ella fitzgerald (1917-1996): African American. Singer. Ella fitzgerald, who was to win more Grammy Awards than any other jazz musician, began as a singer with Chick Webb and his band. She later sang with Dizzy Gillespie and became known for her improvisations and iscati singing, playing with words and musical notes. She demonstrated expert taste in material. Her recorded songbooks of music by the Gershwins, Duke Ellington, Cole Porter, and others remain definitive. Lyricists loved to have her record their works; her razor sharpness guaranteed that every work would be meaningful. Composers loved her dedication to melody, and jazz musicians loved her improvisation. Along with Billie Holiday, she is generally considered to be one of the greatest female jazz singers of her generation.

25
Anzac Day: Australia and New Zealand. This is Australiais most important national occasion of commemoration, marking the anniversary of the first major military action by Australian and New Zealand Army Corps (ANZAC) during World War I. Religious services are held at dawn across the nation. Later in the day, former servicemen and women meet and join in special marches, rekindling memories of their experiences. Commemorative ceremonies are held at war memorials around the country, including observing one or two minutes of silence.

25
Liberation Day: Italy. This commemorates the day in 1945 that that Italy was liberated from German occupation during World War II.

25
Liberation Day: Portugal. This commemorates the bloodless revolution in 1974 that overthrew the dictatorial regime of Antonio Salazar and the reestablishment of democracy.

25
Sinai Liberation Day: Egypt. This day commemorates the signing of the peace treaty between Egypt and Israel in 1982.

27
Freedom Day : South Africa. This commemorates the day in 1994 when for the first time all South Africans had the right to vote.

27
Independence Day : Sierra Leone. This day commemorates Sierra Leoneis independence from Great Britain in 1961.

28
Ann Petry (1908)-1997): African American. Writer. Born in Old Saybrook, Connecticut, Ann Petry later married and moved to Harlem where she held a variety of jobs, including editor of the womenis pages of The Peopleis Voice, a weekly paper started by Adam Clayton Powell Jr, She published a story n iOn Saturday, the Sirens at Nooni n in The Crisis, the magazine of the NAACP, that was later explained into a novel and published by Houghton Mifflin in 1946 as The Street. This novel was the first major literary work to focus on every day life in Harlem. It achieved critical and popular acclaim, selling 1.5 million copies. This is the day of her death.