The 4th of Brewfest is the Autumnal Equinox, when the sun crosses the equator from north to south. This date is the official end of high summer and the beginning of autumn on the Greyhawk Calendar. This date is holy to Wenta and is sometimes regarded as an unofficial holy day of Velnius. Among the xvarts, it also marks the celebration of Raxivort's Orgy. The worshippers of Rillifane Rallathil celebrate the Transformation on this day, a time of dancing and spiritual rebirth marking the beginning of autumn and the promise that spring will come again.
- Boyd, Eric L. Demihuman Deities. Renton, WA: Wizards of the Coast, 1998.
- Mona, Erik. River of Blood. Renton, WA: Wizards of the Coast, 2000.