Flag of Uruguay Flag of Uruguay The national flag of Uruguay () is one of the three official flags of Uruguay alongside with the Flag of Artigas and the Flag of the Treinta y Tres. It has a field of nine equal horizontal stripes alternating white and blue. The canton is white, charged with the Sun of May, from which 16 rays extend, alternating between triangular and wavy. The flag was first adopted by law on December 16, 1828, and had 19 stripes until July 11, 1830, when a new law reduced the number of stripes to nine. The flag was designed by
Flag of the Netherlands the national coat of arms on the white stripes. From the same period dates the custom, prescribed spontaneously by popular will, to fly an orange pennant together with the national flag as a sign of allegiance of the people to the House of Orange. The pennant is added on King's Day (Dutch: "Koningsdag", April 27) or other festive occasions related to the Royal Family. On February 19, 1937, a Royal Decree issued by Queen Wilhelmina finally laid down the red, white and blue colours as the national flag (heraldic colours of bright vermilion, white and cobalt blue). The flag of