Core time refers to the period of the day when employees are required to be present at work. This time is crucial for ensuring that all tasks and duties are performed efficiently and in a timely manner. There are different terms that can be used interchangeably with core time, such as designated time, peak hours, essential hours, mandatory time, required hours, and set timeframe. All of these terms emphasize the importance of the time that employees are expected to invest in the workplace. It is crucial for employers and employees alike to respect the core time to ensure that productivity and goals are achieved within the designated time period.