<Table> <Tr> <Td> Part of a series on </Td> </Tr> <Tr> <Th> Generations </Th> </Tr> <Tr> <Td> <Ul> <Li> Lost Generation </Li> <Li> G.I. Generation </Li> <Li> Silent Generation </Li> <Li> Baby boomers </Li> <Li> Generation X </Li> <Li> Millennials </Li> <Li> Generation Z </Li> </Ul> </Td> </Tr> </Table> <Tr> <Td> Part of a series on </Td> </Tr> <Tr> <Th> Generations </Th> </Tr>

When would someone have to be born to be 21 today