Kanreki — a person's 60th birthday (in traditional counting sometimes 61), marking the completion of a full sexagenary cycle and often celebrated as a milestone.
来月、父が還暦を迎えるのでお祝いをする予定だ。
My father will reach his kanreki next month, so we plan to celebrate.
還暦祝いには赤いちゃんちゃんこを贈る習慣がある。
There is a custom of giving a red 'chanchanko' vest for a kanreki celebration.
祖母の還暦パーティーに親戚が集まった。
Relatives gathered for my grandmother's kanreki party.