The pennant can fly on the flagpole day and night! The recommended length of the pennant is about half the height of the flagpole.
"The traditional host pennant is understood to be the blue cross pennant, which can be used if a proper home region pennant is not available. The blue cross pennant is white at the base and has a navy blue cross on it. The width of the cross is usually about one third of the width of the pennant." >>Host pennant