Spes

In ancient Roman religion, Spes was the goddess of hope. Multiple temples to Spes are known and inscriptions indicate that she received private devotion as well as state cult.

Abode
Spes was one of the divine personifications of the Imperial cult of the Virtues. Spes Augusta was hope associated with the capacity of the emperor as Augustus to ensure blessed conditions.

Like Salus, Ops, and Victoria, Spes was a power that had to come from the gods in contrast to divine powers that resided within the individuals, such as Mens, Virtus, and Fides.

Greek counterpart
The Greek counterpart of Spes was Elpis, who by contrast had no formal cult in Greece. The primary myth in which Elpis plays a role is the story of Pandora. The Greeks had ambivalent or even negative feelings about hope and the concept was unimportant in the philosophical systems of the Stoics and Epicureans.

Literature
In Rick Riordan's the Heroes of Olympus series, the Day of Hope, which falls on August 1, is chosen by the series main antagonist, Gaea, as the day of her awakening. This is done with the irony that the day when humanity would place their hope to their highest would be the day when they would lose all their hope forever.