Ecuador's national flag was standardized in what month and year?

Ecuador’s national flag was standardized in November 2009.

The standardization concerned official rules for the flag’s design, proportions, coat of arms, and permitted uses. Ecuador’s modern tricolor consists of yellow, blue, and red horizontal bands, with the yellow stripe twice the height of either the blue or red stripe.

The tricolor itself has older roots. Ecuador reinstated the colors of Gran Colombia on 26 September 1860, and the coat of arms was added for official government use in 1900. The plain version remains associated with Ecuador’s merchant flag, which is why descriptions of the flag can mention several important dates.

A common mix-up is treating 1860, 1900, and 2009 as competing answers. They refer respectively to the return of the tricolor, the addition of the coat of arms for the national standard, and the later formal standardization of the current design and usage rules.