Hemera is remarked upon in
De Natura Deorum, where it is logically determined that Dies (Hemera) must be a god, if
Uranus is a god.
 The poet
Bacchylides states that Nyx and
Chronos are the parents, but
Hyginus in his preface to the Fabulae mentions
Chaos as the mother/father and Nyx as her sister.
She was the female counterpart of her brother and consort,
Aether (Light), but neither of them figured actively in myth or
cult. Hyginus lists their children as Uranus,
Thalassa (the primordial sea goddess), while
Hesiod only lists
Thalassa as their child.
According to Hesiod's Theogony, Hemera left
Tartarus just as Nyx entered it; when Hemera returned, Nyx left:
- "Nyx and Hemera draw near and greet one another as they pass the great threshold of bronze: and while the one is about to go down into the house, the other comes out at the door."
Pausanias seems to confuse her with
Eos when saying that she carried
Cephalus away. Pausanias makes this identification with Eos upon looking at the tiling of the royal portico in
Athens, where the myth of Eos and Kephalos is illustrated. He makes this identification again at
Amyklai and at
Olympia, upon looking at statues and illustrations where Eos (Hemera) is present.