In Athens, the Thesmophoria took place over three days, from the eleventh to the thirteenth of Pyanepsion. This corresponds to late October in the Gregorian calendar, and was the time of the Greek year when seeds were sown.Click to see full answer. Subsequently, one may also ask, how was Thesmophoria celebrated?Thesmophoria. Thesmophoria, in Greek religion, ancient festival held in honour of Demeter Thesmophoros and celebrated by women in many parts of the Greek world. Possibly during the Stenia, a festival celebrated two days earlier, piglets were thrown into an underground chamber, called a megaron.Beside above, why did the ancient Greeks hold festivals? Festivals and Games. Festivals were a very important part of life in ancient Greece, and were a central part of worshipping the gods. They usually included a procession and a sacrifice. One festival in Athens, held to honour Dionysos, involved a competition between playwrights. Subsequently, one may also ask, when did the festival of Dionysus take place? 5th century Where can you usually find Demeter?Demeter. Demeter is the Greek goddess of the harvest, grain, and fertility. She is one of the Twelve Olympian gods that live on Mount Olympus. Because she was the goddess of the harvest, she was very important to the farmers and peasant people of Greece.