Stuff

  map.calendar 'calendar/:year/:month/:day', :controller => 'activities', :action => 'calendar',  :month => Time.now.utc.month,  :day => Time.now.utc.day,  :year => Time.now.utc.year,   :requirements => {     :year => /\d+/,     :day => /\d+/,     :month => /\d+/   }