nie wiem czy jest polski <<dokładny>> odpowiednik (urok wolnego zawodu), ale IMHO to urlop na życzenie/żądanie w instytucji akademickiej (może i innych); coś w rodzaju "urlopu dziekańskiego" tylko na kilka dni, a nie cały semestr

HTH :)

http://www.lmu.edu/HR/downloads/policies_and_forms/holidays....
The Staff Holiday Schedule provides for up to 16 paid holidays and leave days to be granted during the fiscal year. Each schedule consists of fixed holidays, one floating holiday, and leave days. Fixed holidays are so called because the day of observance is tied to a specific event (e.g., Christmas Day, Labor Day, Memorial Day). The floating holiday is taken at the employee’s option with supervisor approval. The day after Thanksgiving and the days off between Christmas and New Year’s are called leave days.

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Note added at 16 mins (2004-08-16 07:57:08 GMT)
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UTSA Employee Floating Holidays. All full-time benefits eligible employees (including probationary employees) are entitled to 16 hours of floating holiday time. ...
www.utsa.edu/hr/benefits/Leave/HolidaysFloating.cfm