Shift work refers to a work schedule that falls outside the traditional 9-to-5 hours. Employees may work during the night, early morning, or on weekends, depending on the needs of their job. This type of schedule is common in industries such as healthcare, manufacturing, and emergency services, where operations must continue around the clock. Workers in shift jobs often experience varying hours, which can impact their sleep patterns and social life. While some people prefer shift work for its flexibility or higher pay, it can also lead to challenges like fatigue and difficulty maintaining a regular routine.