As one might expect, many festivals of Demeter and Kore were tied to the annual cycle of grain cultivation. Barley and wheat were the staple crops, sown during the fall in most Mediterranean lands. Great anxiety surrounded the fateful question of when to plough and sow, for the farmer must plant late enough to coincide with the fall rains, yet early enough to allow the shoots to become established before the onset of winter cold.8 Therefore the most important festivals and rituals connected with grain cultivation are clustered around sowing time.
As usual, we are best informed about the Attic year. Early in Pyanopsion (October/November), the Proerosia or pre-ploughing sacrifices took place in the demes, including Eleusis. In conjunction with the Proerosia there were at least three sacred ploughings, one at Skiron, one in the Rharian plain of Eleusis, and one in Athens. The Thesmophoria, with its ritual preparation of the seed, followed soon after. During the next month, Poseideion (December/ January), the grain sprouted and began to grow. By the time of the Haloa at the winter solstice, it became evident whether the farmers had chosen their sowing dates wisely. Epigraphic evidence from the fourth century (IG II2 1672.124, 144) shows that huge amounts of firewood were used, probably for the bonfires typical of solstice ritual. At this point in the year, the grain was quiescent because of the cold; only the returning heat of the sun could bring it to fruition. Ancient accounts of the Haloa are late and confused, but it is clear that like the Thesmophoria, the festival involved a link between human and vegetable fertility.9 Temporarily flouting the rules of behavior for respectable females, women gathered at Eleusis drank wine, engaged in sexual banter, and handled pastries shaped like male and female genitals.
In Anthesterion (February/March) the Lesser Mysteries took place just as the grain stalks entered their prime phase of growth, celebrated in the Chloaia (Greening festival). This was probably the main festival of Demeter Chloe, though she also received a sacrifice at the harvest. Perhaps surprisingly, the main harvest observance, known in Attica and some Ionian cities as the Thargelia and in other Greek lands as the Thalysia, had early ties to Apollo and Artemis rather than Demeter. Homer (Il. 9.533-35) thinks of thalusia as first fruit offerings to Artemis, and Apollo was the patron of the Thargelia, but by the Hellenistic period Theocritus (Id. 7.31-38) describes the Thalysia on Kos as a Demeter festival. On the other hand, we know that Demeter was an important figure in the harvest folklore of Greek peasants, who sang songs to her as they reaped. The Kalamaia (Straw festival), probably held in the mid-summer month of Skirophorion, was an Attic/Ionian celebration of the threshing and winnowing. This was also the month of the Skira, a poorly understood festival celebrated by married women who temporarily abstained from sex. Like the Thesmophoria, it was celebrated at a number of sites in Attica.10 Finally, the Eleusinian Mysteries were held in Boedromion (Sep-tember/October), about a month before the ploughing and sowing began once more, renewing the agricultural cycle.