Eveningness refers to a person's natural preference for being active during the evening and night hours. Individuals who exhibit eveningness often feel more alert and productive later in the day, while struggling to wake up early in the morning. This trait is part of a broader concept known as chronotype, which categorizes people based on their sleep-wake patterns. Research suggests that eveningness is influenced by biological factors, including circadian rhythms, which regulate sleep and wakefulness. Evening-oriented individuals may also experience differences in mood and cognitive performance compared to those with a morning preference, known as morningness. Understanding eveningness can help in optimizing work schedules and improving overall well-being.