This is going to give details about any given day in the Oerth (Greyhawk) fantasy calendar. The main focus is the moon cycles.

Input 2 variables $Month $Day

$DayOfWeek $Luna $Celene $Season $Solstace

Month Common Season Needfest 01 Fireseek Winter 02 Readying Spring 03 Coldeven Spring Growfest 04 Planting Low Summer 05 Flocktime Low Summer 06 Wealsun Low Summer Richfest (Midsummer) 07 Reaping High Summer 08 Goodmonth High Summer 09 Harvester High Summer Brewfest 10 Patchwall Autumn 11 Ready'reat Autumn 12 Sunsebb Winter

The months and festivals are based on the cycles of Oerth’s moons, Luna and Celene. Luna has a 28-day cycle, while Celene's cycle is 91 days. Celene is full at the midpoint of each festival, while Luna is full at various times throughout the year. Notably, both moons are full on Richfest 3-5.