[otrs] TimeVacationDays in Core::Time are inherited by Core::Time::CalendarX ?

Hello all! I'd like to know if the TimeVacationDays specified in Core::Time get automagically inherited from the Core::Time::CalendarX (with X between 1 and 9) or do we have to respeify them explicitly in every Calendar. A very happy OTRS 2.3.4 user :-) Thanks in advance, Regards, Luca