還暦 (kanreki — 60th birthday milestone)

The 60th birthday in Japanese tradition, marking one complete cycle of the sexagenary calendar (十干十二支). Celebrated as a symbolic 'rebirth' with red vests and caps (赤いちゃんちゃんこ) — red being the color of newborns' clothing. One of several milestone ages (古希 70, 喜寿 77, 米寿 88) honored with special celebrations.