The hill tribes count their age by nameday, which is typically about half a Cycle after a person's birthday.
Even though nobody remembers why this is the custom, it is likely a result of accommodating around infant death. Most parents now name their child at birth, but their nameday is still an official rite celebrated.
A Cycle is 1.3125 earth years long, and young people are considered adults after receiving their final rite at the first full moons after their 13th nameday.
Ages
One of WyrdeHaven’s Cycles is 1,3125 Earth years or 479,0625 days, requiring a leap year only once every 16 Cycles. Even though a WyrdeHaven day lasted more than 24 Earth hours initially, through magic time entanglement in the portals, the day and night cycles now remain synchronised.