Brightest Night

This article is about the auspicious day known as the Brightest Night. You may be looking for The Brightest Night, the 5th and last book of the first arc.
The Brightest Night occurs when all three moons of Pyrrhia are full.

In arc 1, the brightest night was the night when the dragonets of the false prophecy‘s eggs were hatched. It occurs every 100 years.