long-life celebrations; special birthday celebrations for the 61st, 77th, and 88th birthdays
Refers to traditional Japanese celebrations of longevity, especially the 61st (還暦), 77th (喜寿), and 88th (米寿) birthdays. The term is somewhat formal and may be encountered in cultural contexts.
Relatives gathered for my grandfather's long-life celebration.
The term combines 寿 (longevity, congratulations) and 賀 (celebration). The exact historical derivation is uncertain, but it is conventionally associated with auspicious longevity milestones.