GotoIfTime

Hi

I have found a examble of how to use the GotoIfTime at:
http://www.voip-info.org/wiki/view/Asterisk+cmd+GotoIfTime

but I do not understand how to use the Holidays list. Do i need to make

exten => 3000,1,GotoIfTime(9:00-17:00|mon-fri||?open,s,1) for every holiday or can i do it in a other way?

Best Regrads
Jesper Vels