1.
60th birthday, completion of the sexagenary cycle
The celebration of one's 60th birthday, marking the completion of the traditional Chinese zodiac cycle.
父が還暦を迎えた。
My father turned 60.
還暦のお祝いをする。
To celebrate someone's 60th birthday.
還暦には赤いちゃんちゃんこを着る。
People wear a red vest for their 60th birthday.
Traditional custom
CULTURAL:
The 60th birthday marks the completion of the full cycle of the Chinese zodiac (12 animals × 5 elements). Traditionally celebrated by wearing red, symbolizing rebirth. Other milestone birthdays: 古希 (70), 喜寿 (77), 傘寿 (80), 米寿 (88), 卒寿 (90), 白寿 (99).