劃時代

epoch-marking

to cut / to slash / to scratch (cut into the surface of sth) / to strike (a match)

to delimit / to transfer / to assign / to plan / to draw (a line) / stroke of a Chinese character

o'clock / time / when / hour / season / period

Time, US weekly news magazine

age / era / epoch / period (in one's life) / CL:個|个[ge4]

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