What can begin at any day or hour set by an employer?

The workweek is defined as a fixed period of time that employers determine for their employees, and it can indeed commence on any day or hour as set by the employer. This flexibility allows businesses to align their operations and workforce needs according to various factors such as project demands, industry standards, or logistical considerations.

Establishing a workweek provides a framework for calculating employee wages and overtime, adhering to labor laws, and managing employee time effectively. It can start on any day of the week, whether it be Monday, Sunday, or any other day, and can start at any specific hour, supporting various business models and operational strategies.

In contrast, employee schedules are typically more predictable and can be influenced by an employer's discretion but may not have the same broad flexibility as a workweek. Payroll periods, while also flexible, follow the framework of the established workweek for processing payments but do not individually dictate a start time or day. Work contracts are generally based on mutually agreed terms and do not have the same autonomy for beginning as the workweek does.