请问retired age ,retiring age , retirement age 哪个是正确的，为什么

退休年龄
n. (Trad=退休年龄, Pinyin=tui4 xiu1 nian2 ling2) retirement age
他因接近退休年龄, 就打起高尔夫球来了.
Now he's getting towards retirement age he's started playing golf.
我父亲已过退休年龄，但公司仍请他继续留任。
My father has been asked to stop on at the firm after the usual age.