In my homebrew DnD world there are 12 months. Each season lasts three months. They are, in alphabetical order:
Aan - Fall
Azachi - Spring
Darjo - Winter
Ecli - Summer
Moite - Winter
Paxilor - Fall
Shan - Spring
Solur -
Fall
Termig - Summer
Valom - Spring
Wor - Winter
Xetas - Summer