The Haitian flag has long been a symbol of pride for Haiti. Haitian Flag Day on Monday, May 18, is all about celebrating the culture and heritage of the Haitian flag, which is emblazoned with the country’s coat of arms and the colors red and blue, adopted from the French flag.aitian Flag Day on Monday, May 18, is all about celebrating the culture and heritage of the Haitian flag, which is emblazoned with the country’s coat of arms and the colors red and blue, adopted from the French flag.