Geo Spatial and time information

Hi all, I'm setting up a knowlege base to store festivals and other 
folkloristic stuffs. So at first I need a vocaboulary (owl-dl) for  
geospatial information (countries - regions - cities  and coordinates of 
these items)  and  calendar ones  (when a festival start and stop).

What is the state of the art for the representation of this kind of 
information in owl-dl?

thanks in advance,
Cristiano Longo