In case you're wondering why all those colorful flags are being displayed in Concord on Friday - it is in celebration of United Nations Day.
Here are more details compliments of "Wickipedia":
United Nations Day, proclaimed in 1948 by the United Nations General Assembly, is held annually on October 24, the anniversary of the coming into force of the UN Charter on October 24, 1945. United Nations Day is devoted to making known to peoples of the world the aims and achievements of the United Nations Organization. United Nations Day is part of United Nations Week, which runs from October 20 to October 26.