Why isnt the Nepalese national flag square or oblong like every other country's national flag.?

Question

Why isnt the Nepalese national flag square or oblong like every other country's national flag.?

Answer 1

Wiki says;

The flag was adopted, with the formation of a new constitutional government, on December 16, 1962. The individual pennants had been used for the preceding two centuries and the double pennant since the 19th century. The flag borrows the basic design from the original Hindu design, which has been in use for more than 2,000 years.

This flag is like most Hindu flags - a pennon. It is believed that, Vishnu had organized the Nepali people and given them this flag, with the sun and moon as emblems on it.[1]