Final answer:
In literature, including 'The Saga of Hrolf Kraki and his Champions,' darkness and winter often symbolize evil, and supernatural events like dragon sightings tend to occur during these times.
Step-by-step explanation:
In The Saga of Hrolf Kraki and his Champions, evil supernatural events such as the dragon sighting or Queen Skuld's assault tend to occur during a specific time of year. These events are part of a common narrative thread in literature that associates darkness and winter with malevolent forces. Such motifs are typical in stories involving supernatural and mystical elements, where the environment often reflects the foreboding nature of events to come.
Throughout various narratives and myths, elements like dragons, harsh storms, and battles during dark times symbolize the perennial struggle between good and evil. Evil often emerges more strongly during these dark times, a pattern observed in Norse myths and sagas, which are rich in such symbolism. This association can be traced back to ancient beliefs and has persisted throughout literature, exemplifying how the time of year can be used to heighten the sense of dread and foreboding that precedes an ominous event.