Demeter

Δημήτηρ

Greek goddess of grain, the veiled mother who turns seed into bread

Demeter is the Greek goddess of grain, agriculture and the harvest, one of the Twelve Olympians and a daughter of the Titans Cronus and Rhea. Devotees see in her the mother whose care turns seed into bread. The Romans identified her with Ceres. When her daughter Persephone was taken to the underworld, she searched the earth with torches, and the grain was withheld until the two were reunited.

Devotees turn to her for the harvest, health, birth, marriage and sacred law, as Thesmophoros, the "law-bearer". She presided over the Eleusinian Mysteries, which promised a blessed afterlife and whose inner rites were kept secret. Today Hellenic polytheists honour her through the Athenian festival cycle.

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The Return of Persephone, ca. 1890–91. Wikimedia Commons (CC0), Frederic Leighton

How to recognise Demeter

VeilA fold of her himation is drawn over the back of her hair, as on the seated Demeter of Knidos in the British Museum (c. 350-330 BCE), which shows her modest, serene and motherly.
Wheat-ear garlandA crown of wheat ears or a simple ribbon marks her as goddess of grain, and a metal diadem is attested on the Lycosoura Demeter.
Sheaf of wheatA sheaf or bundle of wheat ears is her most prominent emblem, the sign of the grain she gives and can withhold.
Lit torchA blazing torch recalls her search for Persephone, which the Homeric Hymn describes, and Pausanias mentions a statue of her holding one in the right hand.
Chiton and himationShe is fully clothed in the classical Greek manner, and in the Hymn she wears a dark-blue cloak in her grief.
Mature, maternal bearingShe is neither young nor old but dignified and calm, shown standing or seated on a throne, with warm wheat-gold hair that the Hymn calls "rich".
Persephone and the serpentShe is sometimes shown with her daughter Persephone (Kore), a smaller maiden holding a flower or pomegranate, and the serpent is one of her attested sacred animals.

Names and titles

Bringer of SeasonsThe Homeric Hymn calls her the bringer of the seasons and giver of splendid gifts
Lady of the Threshing FloorDemeter Haloa, honoured at the Haloa festival named for the threshing floor (halos)
The Law-BearerThesmophoros, from thesmos (divine law) and phoros (bearer), her title at the Thesmophoria
Torches in the DarkShe searched the earth with blazing torches for her daughter Persephone
Doso at the Well of EleusisIn the Hymn she came to Eleusis as an old woman, gave her name as Doso and sat by a well

Feast days

Thesmophoria, third day (Kalligeneia)24 October 2026

The third day of the Thesmophoria, Kalligeneia ('beautiful birth' or 'fair-born'). The name is also that of a goddess of fair offspring, whom women invoked while praying for fertility.
How it's celebrated. Sources differ on the day's rites. One account describes a great feast honouring the goddess of beautiful offspring, while an older reference work says nothing is known of what took place. Plutarch notes that women at Eretria did not call on Kalligeneia. This is the same festival as the two entries before it.
Sources: Wikipedia: Thesmophoria · My Eleusis: Thesmophoria · Britannica (1911): Thesmophoria
Haloa4 January 2027 (date to be confirmed)

A midwinter festival of Demeter and Dionysos, named for the halos, the threshing floor. It was kept chiefly at Eleusis and is described as a women's fertility rite. Some accounts also name Poseidon.
How it's celebrated. Ancient accounts describe a feast with cakes shaped like sexual organs, wine and ritual obscenity, and without the foods barred in the Mysteries. Men may have honoured Poseidon separately. One devotee's guide suggests hymns, fruit, grain, wine and baking today, avoiding pomegranates. Modern calendars can differ over when the month begins. The 2027 entry is the same festival.
Sources: Hellenion: Haloa · Wikipedia: Haloa · The Grape and the Fig: Haloa festival
Eleusinian Greater Mysteries16 September 2027 (date to be confirmed)

The Greater Mysteries were the initiation rites of Demeter and Persephone at Eleusis, held over about a week. The mystai (initiates) walked in procession along the Sacred Way from Athens to Eleusis.
How it's celebrated. In antiquity the rites included a sea-bath at Phaleron, fasting and the kykeon drink. What happened in the Telesterion was secret and remains unknown. Visitors today walk the processional path inside the site at Eleusis. Some Hellenic polytheists publish day-by-day calendars for these days. The date is reckoned from the month's start, so it varies between calendars.
Sources: Britannica: Eleusinian Mysteries · Hellenic Centre for Greek Culture (ime.gr): The Eleusinian Mysteries ritual · Calendar of the Eleusinian Mysteries (hellenismo blog)
Proerosia7 October 2027 (date to be confirmed)

The festival of Demeter 'before ploughing', when first-fruit offerings sought her blessing on the sowing to come. This is the same celebration as the earlier Proerosia entry, falling in the following year.
How it's celebrated. Ancient tradition ties it to Eleusis, where offerings arrived from across the Greek world. Modern Hellenic polytheists keep it at home or in small groups, for example with a loaf of grain bread and rainwater at a shrine. Because months follow the moon, it moves against the modern calendar from year to year.
Sources: Hellenion: Proerosia · Hieros Elaionas: Athenian Festival Year
Thesmophoria12 October 2027 (date to be confirmed)

The Thesmophoria, the Athenian women's festival of Demeter and Persephone, kept over three days with an ascent to the sanctuary, a fast and a day named for fair birth. This is the same festival as the earlier Thesmophoria entries, in the following year.
How it's celebrated. Ancient women camped at the Thesmophorion, fasted on the middle day and prayed for fertility. Devotees believed the remains from the pits, mixed with seed-corn, ensured a good harvest. Hellenic polytheists observe the festival today, and the sources I found describe no single modern form. The start day depends on how each calendar reckons the month.
Sources: Oxford Reference: Thesmophoria · My Eleusis: Thesmophoria · Hellenion: Festivals