Meaning of the Nepalese Flag
The flag of Nepal, it’s national flag, is the only non four-sided flag left in the world.
Two triangles – symbolise the Himalayan Mountains.
Crimson red – the colour of the rhododendron national flower.
Blue border – is the colour of peace & harmony.
Sun & Moon – represents permanence, the hope that Nepal will last as long as the sun & moon.
Why is the flag this shape and all other flags are four-sided?
Probably the answer is easier, if the question is asked the other way round: Why are all national flags (except for the Nepali one) rectangular?
The pretty uniform shape of the national flag can be probably explained by the fact that the national flag has its origin in a limited area (Europe and Mediterranean), as ship flags.
Certainly there had been different shapes in the early times, but rectangular clothes of an approximate proportion of between 1.5:1 and 2:1 seemed the most practical ones, so the countries “standardized” this shape.
Afterwards the ship flags had been adapted for terrestrial use. National flags of countries outside Europe only developed after European national flags had standardized their shape, so they were imitating the rectangular shape as well as some of the symbolic elements, vertical/horizontal stripes, for instance.
Older national symbols were transformed to the “European” flag shape but Nepal retained the original shape of its flag. The Nepali flag is probably the only one surviving, something like a “living fossil”.
Usually living fossils survive in rather secluded areas, such as Nepal, not having coastal access, and being mountainous, or like Switzerland still sticking to the square shape of its flags.
– Marcus E.V. Schmöger, 17 July 2004
Evolution of Nepal’s Flag
Until 1962 the flag of Nepal had human faces inside the sun & moon. They were removed to modernise the flag.
Earlier versions of the flag were based upon two separate pennants which belonged to rival branches of the Rana dynasty, which formerly ruled the country.