Almost exactly nine months after World War II ended, “the cry of the baby was heard across the land,” as historian Landon Jones later described the trend. More babies were born in 1946 than ever before: 3.4 million, 20 percent more than in 1945. This was the beginning of the so-called “baby boom.” In 1947, another 3.8 million babies were born; 3.9 million were born in 1952; and more than 4 million were born every year from 1954 until 1964, when the boom finally tapered off. By then, there were 76.4 million “baby boomers” in the United States. They made up almost 40 percent of the nation’s population.
Generation X, commonly abbreviated to Gen X, is the generation born after the Western post-World War II baby boom.Demographers, historians and commentators use beginning birth dates from the early 1960s to the early 1980s.
Generation Y, also known as the Millennial Generation, is the demographic cohort following Generation X. There are no precise dates for when Generation Y starts and ends. Commentators use beginning birth dates from the latter 1970s, or from the early 1980s to the early 2000s.