Decade ("60s" or "sixties"), although this may leave it uncertain which century is meant. These references are frequently used to encapsulate popular culture or other widespread phenomena that dominated such a decade, as in "The Great Depression of the 1930s" or "The Roaring Twenties". However, the Gregorian calendar begins with the year 1. (There is no year "zero", and the year before AD 1 is 1 BC with nothing in between.) Therefore, its "first" decade is from AD 1 to AD 10, the "second" decade from AD 11 to AD 20, and so on. So, although "the 1960s" comprises the years
Roaring Twenties War I. As such, the period is also often referred to as the Jazz Age. The Wall Street Crash of 1929 ended the era, as the Great Depression brought years of hardship worldwide. The Roaring Twenties was a decade of economic growth and widespread prosperity, driven by recovery from wartime devastation and deferred spending, a boom in construction, and the rapid growth of consumer goods such as automobiles and electricity in North America and Western Europe and a few other developed countries such as Australia. The economy of the United States, which had successfully transitioned from a wartime economy to