Tallinn, Estonia: Jazzkaar, April 21-30, one of the city's major events, offering jazz, blues and world music.
Cavaliers River Parade, April 24, in which dozens of elaborately decorated floats drift down the San Antonio River.
Stratford-upon-Avon, England: Shakespeare's birthday celebrations, April 22.
United States: Earth Day, April 22.
Hamburg, Germany: Hamburg Marathon, April 23.
London: London Marathon, April 23.
Seville, Spain: Feria de Abril, April 25-30, with round-the-clock flamenco and more.
Cork, Ireland: Cork International Choral Festival, April 26-30.
Oban, Scotland: Highlands & Islands Music & Dance Festival, April 27-30.
Shetland Islands, Scotland: Shetland Folk Festival, April 27-30.
Speyside, Scotland: Speyside Whisky Festival, April 27-May 1, celebrates Scotch with tastings, distillery tours, lectures and more.
Rosscarbery, Ireland: The Oyster Guinness Festival, April 27-May 1 Shellfish and stout accompanied by traditional Irish music.
Chicago: Art Chicago in the Park, April 28-May 1, at Butler Field, one the country's most important art fairs.
Parma, Italy: The Verdi Festival, April 28-June 16, is held annually in the composer's home province.
Netherlands (various locations): Queen's Day, April 30, celebrates the birthday of the late Queen Juliana, one of the country's liveliest holidays.
Sweden (various locations): Walpurgis Night, April 30, celebrated with the lighting of bonfires all over the country.
Florence, Italy: Maggio Musicale Fiorentino, April 30-June 14, Italy's oldest music festival.
Memphis, Tenn.: Beale Street Music Festival, May 5-7.