Festivities of Agost Activity · Agost, L'Alacantí, Alicante Image of Agost, not of the place itself. Agost's patronal festivities, which date back to the 18th century, are held from the 25th of June to the 1st of July in honor of San Pedro Apóstol and were declared of Provincial Tourist Interest in 1986. Photo: Varios (CC BY-SA 4.0) What to see and do in Agost