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kanreki; one's 60th birthday (or 61st in the traditional age reckoning system) when one has lived through a full sexagenary cycle
父の還暦のお祝いに家族全員が集まった。
The whole family gathered to celebrate my father's 60th birthday.
還暦を迎えた母に赤いちゃんちゃんこを贈った。
I gave my mother a red vest for her 60th birthday.
還暦を過ぎても彼は現役で働いている。
Even past his 60th birthday, he is still working actively.