29 C.F.R. § 780.609 Workweek unit in applying the exemption.
Title 29 - Labor
The unit of time to be used in determining the application of the exemption to an employee is the workweek. (See Overnight Transportation Co. v. Missel, 316 U.S. 572.) A workweek is a fixed and regularly recurring interval of seven consecutive 24-hour periods. It may begin at any hour of any day set by the employer and need not coincide with the calendar week. Once the workweek has been set it commences each succeeding week on the same day and at the same hour. Changing of the workweek for the purpose of escaping the requirements of the Act is not permitted.
Title 29: Labor
PART 780—EXEMPTIONS APPLICABLE TO AGRICULTURE, PROCESSING OF AGRICULTURAL COMMODITIES, AND RELATED SUBJECTS UNDER THE FAIR LABOR STANDARDS ACT
Subpart G—Employment in Agriculture and Livestock Auction Operations Under the Section 13(b)(13) Exemption
Requirements for Exemption
§ 780.609 Workweek unit in applying the exemption.