A baby boomer is a person who was born during the demographic Post-World War II baby boom and who were born from the mid-1940s through to the early 70’s.

They are named after the huge boom in birth rates at the end of World War II.

Generation X is the generation born after the Western post–World War II baby boom ended. The term generally includes people born in the 1960s through the late ‘70s, rarely as far as the early ‘80s.
In Australia, there is debate over when Generation X ends and Generation Y begins. The Australian Bureau of Statistics use a 1965-1981 birth range to define Gen X.

Also known as the Millennial Generation, it describes the demographic cohort following Generation X. There are no precise dates for when the Millennial generation starts and ends, and commentators have used birth dates ranging somewhere from the mid-1970s to the mid 1990s, with some sources including as late as the early 2000’s.