A feast is a grand, festive meal, something all human cultures in Six Ages seem to appreciate. It's also a social occasion, with all the pitfalls that entails...
Events sometimes include the option to throw a feast, usually costing only a few cows in meat.
There are also three feast Ventures: Clan Hall Feast, necessary for finishing the clan hall; Feast, which raises your mood; and Feast Neighbors, which naturally helps your relations as well. Feast Neighbors is only possible with Nyalda's Hospitality blessing, which also allows you to use the regular Feast venture multiple times per year.