Wazzup Pilipinas!
Demeter is the goddess of harvest, agriculture, grains and farmlands.
Demeter is the daughter of Cronus and Gaia and sister of Zeus by whom she became the mother of Persephone. When Persephone was abducted by Hades, lord of the underworld, Demeter wandered the earth in search of her lost child. During this time, Demeter was refusing to feed the earth by growing grains, which caused a great and terrible famine on earth. Since no one else could do her job, Zeus-- ever mindful of god's needs for worshipers-- decided to sent Hermes to the underworld, ordering Hades to restore Persephone to her mother. However, before Persephone left, she ate six pomegranate seeds which bound her to the underworld forever. And so it was arranged that Persephone would spend six months a year above ground with her mother, but she would have to spend the remaining months in the land of dead with her husband.
And that is how it has been since then, according to the story: that's why we have the seasons.