In recent years, growing scientific evidence has highlighted a compelling link between chronotypeāparticularly the tendency to stay up lateāand cardiovascular health risk. Individuals commonly referred to as ānight owlsā often exhibit lifestyle patterns that may disrupt circadian rhythms, influence metabolic regulation, and increase susceptibility to conditions such as hypertension, obesity, and heart disease. As modern work schedules and digital exposure continue to reshape sleep behaviors worldwide, understanding how late-night habits impact long-term cardiovascular outcomes has become an urgent public health priority. This article explores the physiological mechanisms, behavioral factors, and emerging research connecting evening chronotypes with elevated cardiovascular risk.