Novian Calendar (No-vee-an Cal-en-dar)

It is named after Novi, an ancient astronomer and mathematician. It has 12 months with 30 days each, making 360 days in a normal year.

Wintertide
Icewind
Thawmonth
Greengrow
Flowerbloom
Summerjoy
Heatpeak
HarvestGold
Leafall
Frostlock
Snowguard
Coldnight

Wintertide and Coldnight represent the depths of winter. Thawmonth marks the transition from winter to spring. Greengrow, Flowerbloom and Summerjoy are the spring and summer months. Heatpeak represents the height of summer. HarvestGold and Leafall represent the fall harvest season. Frostlock and Snowguard transition back to winter again.