Nepal

The national flag of Nepal is the only non-quadrangular national flag, and one of only two non-rectangular official jurisdictional flags in the world (the other is the flag of Ohio). The flag is a simplified combination of two single pennants from different branches of the previous rulers, the Rana dynasty. The flag was adopted, with the formation of a new constitutional government, on December 16, 1962. The individual pennants had been used for the last two centuries and the double pennant since the 19th century.