[O] org-class, instead of (all) holidays could there be a set of holidays that could be skipped?

[Enda]

http://orgmode.org/worg/org-faq.html#org-class
> " If one of
the SKIP-WEEKS is the symbol holidays, then any holidays known to the
calendar are also skipped. "


Using org-class, instead of the symbol holidays to denote all holidays, could 
there be a set of holidays that could be skipped denoted by another symbol?


- Enda