Nightfall and periods are two completely different phenomena.
- Nightfall refers to the time of day when the sun sets and darkness descends. It is a natural occurrence caused by the Earth's rotation.
- Periods are a monthly cycle of bleeding that occurs in women and people with uteruses. This is a biological process regulated by hormones.
While both events are cyclical, they have no connection to each other. Nightfall is determined by the Earth's position relative to the sun, while periods are regulated by the female reproductive system.
