Reference notes
Sources and Methodology
Generation labels are broad cultural shortcuts, not exact scientific categories. This page explains the birth-year boundaries and current-age calculation used across the site.
Birth-Year Boundaries
The Silent Generation through Generation Z ranges follow common U.S. research and reference definitions, especially Pew Research Center's Millennial and Gen Z boundary and the Library of Congress generation guide.
Generation Alpha is shown as 2013-2024 to avoid overlap with the common 1997-2012 Gen Z range. Some sources use 2010-2024 for Alpha. Generation Beta is shown as 2025-2039 based on McCrindle's emerging cohort definition.
How Current Ages Are Calculated
The site uses the visitor's current browser date. For each generation, the oldest possible age is calculated from January 1 of the first birth year, and the youngest possible age is calculated from December 31 of the final birth year. For active or future-ending cohorts, the youngest age is based only on members born so far.
This is why the numbers can change during the year and again when the calendar year changes. No current calendar year is hardcoded into the age calculations.
External Sources
Pew Research Center: Where Millennials end and Generation Z begins
Library of Congress: Consumer Research, Market Segments, Generations