Greyhawk calendar

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Months of the Year

Month				Notable days
Common	Elven	Nomad	Season	Notable days
Fireseek	Diamondiche	Tiger	Winter
Readying	Yellowillow	Bear		14: Lunar festival
Coldeven	Snowflowers	Lion		28: Spring equinox, Growfest
Planting	Blossoms	Frog	Spring
Flocktime	Violets	Turtle		14: Lunar festival
Wealsun	Berrytime	Fox		28: Summer solstice, Richfest
Reaping	Goldfields	Snake	Summer
Goodmonth	Sunflowers	Boar		14: Lunar festival
Harvester	Fruitfall	Squirrel		28: Autumn equinox, Brewfest
Patchwall	Brightleaf	Hare	Autumn
Ready'reat	Tinklingice	Hawk		14: Lunar restival
Sunsebb	Lacysnows	Wolf		28: Winter solstice, Needfest

Days of the Week

Day	Notes
Moonday	Exact moon phase at first midnight
Godsday	Worship
Waterday	Work
Earthday	Work
Freeday	Rest
Starday	Work
Sunday	Work

Year, Seasons, and Celestial Bodies

The Oerdian year has 336 days, divided into 12 months of 28 days each. Solar and lunar months coincide, with the large moon, Luna, having a period of 28 days and the small moon, Celene, having a period of 84 days. Luna's new moon is always at the change of the months, while Celene's new moon is at the beginning of each season.

There are eight major astronomical festivals of the the year, four solar and four lunar. The solar festivals are the winter solstice, spring equinox, summer solstice, and autumn equinox. The lunar festivals are when Luna and Celene are full at the same time and happen exactly 42 days after the solar festivals. At each solar festival, both moons are new.

Planets

There are also five visible planets, named Atroa, Sotillion, Telchur, Wenta, and Velnius. Atroa is the innermost planet and visible at the spring solstice, Sotillion the second planet and visible at the summer equinox. Telchur is the forth planet (Oerth being the third) and most visible around the vinter solstice. Wenta is the fifth planet, most visible in autumn. Velnius is the sixth and final planet, barely visible from Oerth and not associated with any season.

All celestial bodies are named after the gods they correspond to, tough not all people recognize them as such.

Seasons and Climate

There are four universally recognized seasons,though their effects vary widely by geographical area. In general, the north and south of the Flanaess has easterly winds, warm in the south and cold in the north, both humid and bringing a lot of rain and snow and making the climate relatively stable. There are westerly winds and currents to the north and south of the Flanaess bringing warm water to the Dravmidj and Solnor Oceans. The weather in the Thillonieian peninsual is particularily violent and snowy, with a warm sea current from the east and cold winds from the west.

Inland areas have a more variable climate and are much drier. Summers days are warm, winter nights are icy cold even far to the south.

Autumn

Dominant easterly winds brings rain and snow all over the Flanaess.

Winter

When the winds let up, the cold comes to the north. Sudden storms are common, though the weather is generally fairly sunny. Winds tend to be from the north and north-east.

Spring

Westerly winds clean up the skies, tough this is a season of great stability and there are generally a few easterly rainstorms, especially in coastal regions. These rarely bow very hard or very long.

Summer

Weak south-westerly winds brings dry, warm air, perfect for maturing cereals.

Months and Weeks

Each month consists of four weeks and is both 1/12 of a year and one cycle of the larger moon, Luna. Luna is in new moon at the beginning of each month and full on the 14th of each month. The new day begins at midnight.

Tides

The tides are cyclic over the month. At the beginning of the first and third week, high tide is at dusk at dawn. Depending on the latitude and the time of year, the actual time of sunrise varies, but high tide occurs at 6 am and 6 pm at the beginning of each month. At the beginning of the second and fourth week, high tide is three hours later.