We don't know, seeing as how our month/year is different from ancient Greece, which is lost to history.
Greek myth does not come with dates of birth for goddesses.
Demeter, the Greek goddess of agriculture, does not have a specific birthday mentioned in mythology. In ancient Greek religion, gods and goddesses were not typically assigned specific birthdates as humans are. Demeter's importance lies in her role as the goddess of the harvest and fertility, particularly in relation to the growth of crops and the changing of seasons. She is often associated with the Eleusinian Mysteries, a religious festival celebrating the cycle of life, death, and rebirth.
We don't know, seeing as how our month/year is different from ancient Greece, which is lost to history.
There was no "god of Demeter", Demeter was a Greek goddess.
Demeter
Demeter was not married. Demeter had two consorts in Karmanor and Iasion.
Demeter was older. Demeter was born of Cronus and Rhea. Her brothers were Zeus, Hades, and Poseidon. Since Artemis is a daughter of Zeus, Demeter's youngest sibling, Demeter has to be older. This also makes Artemis Demeter's niece.
demeter
Demeter the meter! come see Demeter heaters!
No. Demeter is a Greek name. The Roman name for Demeter is Ceres.
Demeter is a girl. Demeter was a Greek goddess of agriculture.
demeter protects the harvest