I’m confused with ages here, have we standardized this?

• Greatest Generation (born roughly 1901–1927)
• Silent Generation (1928–1945)
• Baby Boomers (1946–1964)
• Generation X (1965–1980)
• Millennials (1981–1996)
• Generation Z (1997–2012)
• Generation Alpha (born around 2013–2024)
• Generation Beta (2025–2039)