New Year. It's what they called it before it went away, noted on January first. It changed many times, the year didn't used to be like this. The orbital period never changes but they changed the calendar.

It's different on other worlds. Orbital periods are longer, shorter. Different customs.

Persephone's is 121 days. It orbits Lux, the protostar of the White Sun system. It's hotter than Earth's sun.

New Year isn't the same.