Baby boomers are people born during the demographic post–World War II baby boom approximately between the years 1946 and 1964, giving an age range between and as of 2016. According to the U.S. Census Bureau, the term "baby boomer" is also used in a cultural context. Therefore, it is impossible to achieve broad consensus of a precise date definition, even within a given territory. Different groups, organizations, individuals, and scholars may have widely varying opinions on what constitutes a baby boomer, both technically and culturally. Ascribing universal attributes to a broad generation is difficult, and some observers believe that it is inherently impossible. Nonetheless, many people have attempted to determine the broad cultural similarities and historical impact of the generation, and thus the term has gained widespread popular usage.