The national flag of Bhutan (Dzongkha – Wylie: hpha-ran-sa-kyi dar-cho) is one of the national symbols of Bhutan.
The Bhutan flag is based upon the tradition of the Drukpa Lineage of Tibetan Buddhism and features Druk, the Thunder Dragon of Bhutanese mythology. The basic design of the flag by Mayum Choying Wangmo Dorji dates to 1947. A version was displayed in 1949 at the signing of the Indo-Bhutan Treaty. A second version was introduced in 1956 for the visit of Druk Gyalpo Jigme Dorji Wangchuk to eastern Bhutan; it was based upon photos of its 1949 predecessor and featured a white Druk in place of the green original.
The Bhutanese subsequently redesigned their flag to match the measurements of the flag of India, which they believed fluttered better than their own. Other modifications such as changing the red background color to orange led to the current national flag, in use since 1969. The National Assembly of Bhutan codified a code of conduct in 1972 to formalize the flag’s design establish protocol regarding acceptable flag sizes and conditions for flying the flag. Wikipedia