Circadian biology is a captivating field that delves into the intricate workings of living organisms, exploring the mechanisms and functions of circadian rhythms. These rhythms are internal clocks that regulate various physiological, behavioral, and molecular processes in living organisms on a roughly 24-hour cycle. The master clock within the brain, known as the suprachiasmatic nucleus (SCN), coordinates all internal clocks, ensuring harmonious and punctual functions. Light is crucial in regulating circadian rhythms, acting as an 'alarm clock' for our internal schedules. Disruptions to circadian rhythms can have significant consequences, impacting our daily lives and health. To maintain a healthy rhythm, getting plenty of sunlight, sticking to a routine, limiting screen time before bed, and eating meals at regular times are recommended.