A dwarven year consists of 12 months, each exactly 28 days long. Three months make a season (spring, summer, autumn, winter), and year starts on the first day of spring. You can view the current date on the Status Overview screen.
Months are named after kinds of stones, ore, gems and wood as follows (also showing which caravan arrives each season):
Spring | Granite, Slate, Felsite | Elven |
Summer | Hematite, Malachite, Galena | Human |
Autumn | Limestone, Sandstone, Timber | Dwarven |
Winter | Moonstone, Opal, Obsidian | None |
There are also full moons on certain fixed dates every year. Werebeasts will transform into their werebeast form on these days:
25th Granite · 23rd Slate · 21st Felsite · 19th Hematite · 17th Malachite · 15th Galena · 13th Limestone · 10th Sandstone · 8th Timber · 6th Moonstone · 4th Opal · 2nd Obsidian · 28th Obsidian