Nightfall in literature is often portrayed as the turning point between the bright certainties of day and the shrouded mysteries of night. It marks not only the literal end of daylight but also signals pivotal moments in narrative transitions—from the quiet return indoors noted in the works of Casanova ([1], [2], [3]) to the onset of danger or suspense as characters prepare for secretive journeys or face impending threats ([4], [5], [6]). At times, nightfall sets the scene for both the routine and the extraordinary; it cues the closing of public spaces and the beginning of protective measures in urban settings ([7], [8]), while in other narratives it heralds moments of introspection or even the eerie, as in the swirling of bats overhead ([9]). The term often serves as a temporal milestone, underscoring the urgency of action or the finality of retreat, as seen when armies gather or when forbidden excursions commence ([10], [11]). By evoking the dual sense of inevitable darkness and the promise—or peril—of what lies beyond, nightfall emerges as a multifaceted symbol in literature, bridging the natural cycle of time with the deep undercurrents of human experience ([12], [13], [14]).