If working on a ***listed off-duty day***, this is compensated for with ordinary 8 working hours pay along with a substitute non-working day.

sources:

***Off-Duty Day*** for Station Crew | International Space Fellowship - 3 Dec 2009 ... Expedition 22 Commander Jeff Williams and Flight Engineer Max Suraev of the two-person International Space Station crew enjoyed their second ...
spacefellowship.com/2009/.../off-duty-day-for-station-crew/ -

NASA Space Shuttle, Moon, Mars, Station Informations: Off-Duty Day ... - 2 Dec 2009 ... ***Off-Duty Day*** for Station Crew ... of the two-person International Space Station crew enjoyed their second of two off-duty days Wednesday. ...
space-station-shuttle.blogspot.com/.../off-duty-day-for-station-crew.html -

***Off-Duty Cop*** Saves the Day at Brooklyn Armed Robbery - Gothamist - 10 May 2009 ... Off-Duty Cop Saves the Day at Brooklyn Armed Robbery. 2009_05_melsauto.jpg An attempted robbery at an East Flatbush auto shop yesterday ...
gothamist.com/.../off-duty_cop_saves_the_day_at_brook.php -

***Non-working days*** - The term non-working days is used to refer to a day on which the interpreter does not work, but which is part of a contract and therefore entitles the ...
www.aiic.net/glossary/default.cfm?ID=205 -

Allow for ***Non-working Days*** in Due Date Calculations - Due dates based on 'days before [target date]' will also take non-working days into consideration when these due dates are calculated. ...
www.editorialmanager.com/...

***Non-working days*** - Aarhus School of Business, University of Aarhus - Non-working days. 1. Employees have the following days off because ASB is closed: - Wednesday before Easter from 12 noon. - Denmark's Constitution Day on 5 ...
www.asb.dk › For Employees › Staff/Faculty › ABC › F -

ordinary day off is simple enough.

another way would be "listed holidays"