Varicolored scarves, known as rachu for women and kabney for men, are important indicators of social standing, as Bhutan has traditionally been a feudal society; in particular, red is the most common colour worn by women. The "Bura Maap" (Red Scarf) is one of highest honours a Bhutanese civilian can receive. It, as well as the title of Dasho, comes from the throne in recognition of an individual's outstanding service to the nation. On previous occasions, the King himself conferred Bura Maaps to outstanding individuals such as the Director General of Department Hydropower and Power System, Yeshi Wangdi, the Deputy Chairperson of National Council, Dasho Dr. Sonam Kinga, and former National Assembly Speaker, Dasho Ugyen Dorji. Architecture Bhutanese architecture remains distinctively traditional, employing rammed earth and wattle and daub construction methods, stone masonry, and intricate woodwork around windows and roofs. Traditional architecture uses no nails or iron bars in construction. Characteristic of the region is a type of castle fortress known as the dzong. Since ancient times, the dzongs have served as the religious and secular administrative centers for their respective districts. The University of Texas at El Paso in the United States has adopted Bhutanese architecture for its buildings on campus, as have the nearby Hilton Garden Inn and other buildings in the city of El Paso. Public holidays Bhutan has numerous public holidays, most of which coincide with traditional, seasonal, secular or religious festivals. They include the winter solstice (around 1 January, depending on the lunar calendar), Lunar New Year (February or March), the King's birthday and the anniversary of his coronation, the official end of monsoon season (22 September), National Day (17 December), and various Buddhist and Hindu celebrations. Film industry Music and dance Dance dramas and masked dances such as the Cham dance are common traditional features at festivals, usually accompanied by traditional music. At these events, dancers depict heroes, demons, dæmons, death heads, animals, gods, and caricatures of common people by wearing colourful wooden or composition face masks and stylised costumes. The dancers enjoy royal patronage, and preserve ancient folk and religious customs and perpetuate the ancient lore and art of mask-making. The music of Bhutan can generally be divided into traditional and modern varieties; traditional music comprises religious and folk genres, the latter including zhungdra and boedra. The modern rigsar is played on a mix of traditional instruments and electronic keyboards, and dates back