Cal. Gov. Code § 19996.20

“Reduced worktime,” as used in this article, means employment of less than 40 hours of work per week, and includes arrangements involving job sharing, four-, five-, or six-hour workdays, jobs which provide eight hours of employment or less for one, two, three, four or five days per week, and such other arrangements which the department finds consistent with maximum employment opportunity to employees desiring other than a standard worktime.