The Horae are the goddesses of the hours and seasons. They are daughters of Zeus and Themis and sisters of the Fates, Nemesis, and Tyche (Nemesis and the Fates are also called daughters of Erebus and Nyx, personifications of darkness and night)
The Twelve Horae are daughters of Chronos and Ananke and sisters to Aether, personification of the upper air. They are the goddesses of the hours of the day. They lead Helios into the sky when he rides his Chariot.