Calans gregorek

An calans gregorek yu an calans usadow y'n Howlsedhes hedhyu. Yth usyr dedhyow an calans gregorek warbarth gans bledhynnow an "Os Kemmyn" (po "Os Cryst"), herwyth usadow.

Ottoma mysyow an vledhen y'n calans gregorek:
 Mys Genver
 Mys Whevrer
 Mys Merth
 Mys Ebrel
 Mys Me
 Mys Metheven
 Mys Gortheren
 Mys Est
 Mys Gwyngala
 Mys Hedra
 Mys Du
 Mys Kevardhu

Klass:Kalenderyow