Dark Sun: The Scorched World of Athas
The Festival of the Cooling Sun
The five day festival in the season of Sun Descending.
During the festival week, celebrations and gatherings differ from locale to locale and range from pleasant fairs to grim sacrifices. Merchants use festival weeks to take stock, unload unwanted or overstocked products, and prepare for the next third of the year. A festival is a good time to get deals in the emporiums.