Sleep quality and the time a person wakes up are directly correlated to each other. In order to determine the best time to wake up, it is vital to first understand how much sleep an average person would need. Our internal body clock, or circadian rhythm, helps our body and brain slow down as it gets late at night and invigorates us with energy as the sun rises in the morning. After waking up and being exposed to sunlight, the brain relays a message to the body that results in an increase in temperature and stimulation of the metabolism. Therefore, many people wake up when the sun rises and go to bed when it sets, but this may not be ideal for everyone, especially people living in higher latitudes where there is more daylight in the summer and less in the winter. What is most important is to wake up at the same time every day and have a consistent sleep-wake cycle, as this promotes overall health and creates a regular schedule.