年代

a decade of a century (e.g. the Sixties) / age / era / period / CL:個|个[ge4]

surname Nian

year / CL:個|个[ge4]

grain / harvest (old) / variant of 年[nian2]

to substitute / to act on behalf of others / to replace / generation / dynasty / age / period / (historical) era / (geological) eon

chronology (the science of determining the dates of past events)

the sixties / the 1960s

geological time scale

beginning of an age / beginning of a decade

What decade are you living in? / That's so out-of-date!

the seventies; the 1970s

the seventies / the 1970s