Third shift, also known as the graveyard shift, refers to the period of time when workers start their duties during the early hours of the morning and spend the entire night working until the morning shift takes over. Other synonyms that can be used to describe the third shift include the night shift, the late shift, the overnight shift, and the graveyard shift. These terms are commonly used in industries such as healthcare, transportation, manufacturing, security, and hospitality, where round-the-clock operations are necessary. Regardless of the job or industry, working a third shift can be challenging due to the human body's natural tendency to sleep during the night.