DISPLAYING HOLIDAYS ON BAR CHART

I have plugged in Government holidays in the global calander. Do I have to do another step to assign these holidays as I want to display Government holidays on my bar chart. Could any one help me to explain step by step that how can I sow holidays on the bar chart as non working days.So when i take a print out of schedule or 3- Week lookahead schedule i can see holidays on the print out of bar chart.

Thanks