Bagan (Burmese: ပုဂံ; MLCTS: pu.gam, pronounced [pəɡàN]), formerly Pagan, is an ancient city in the Mandalay Division of Burma. Formally titled Arimaddanapura or Arimaddana (the City of the Enemy Crusher) and also known as Tambadipa (the Land of Copper) or Tassadessa (the Parched Land), it was the ancient capital of several ancient kingdoms in Burma. It is located in the dry central plains of the country, on the eastern bank of the Ayeyarwady River, 90 miles (145 km) southwest of Mandalay.

Bagan was submitted to become a UNESCO heritage site but many speculate of politics as partly the reason for the exclusion. UNESCO does not designate Bagan as a World Heritage Site. The main reason given is that the military junta (SPDC) has haphazardly restored ancient stupas, temples and buildings, ignoring original architectural styles and using modern materials which bear little or no resemblance to the original designs. The junta has also established a golf course, a paved highway, and built a 200-foot (61-m) watchtower in the southeastern suburb of Minnanthu.

Burma, officially the Union of Myanmar, is the largest country by geographical area in Indochina (mainland Southeast Asia). The country is bordered by China on the north-east, Laos on the east, Thailand on the south-east, Bangladesh on the west, India on the north-west and the Bay of Bengal to the south-west with the Andaman Sea defining its southern periphery. One-third of Burma's total perimeter, 1,930 kilometres (1,199 mi), forms an uninterrupted coastline.

The country's culture, heavily influenced by neighbours, is based on Theravada Buddhism intertwined with local elements. Burma's diverse population has played a major role in defining its politics, history and demographics in modern times, and the country continues to struggle to mend its ethnic tensions. The military has dominated government since General Ne Win led a coup in 1962 that toppled the civilian government of U Nu. Burma remains under the tight control of the military-led State Peace and Development Council.

Sunset is the daily disappearance of the sun below the horizon as a result of the Earth's rotation. The atmospheric conditions created by the setting of the sun, occurring before and after it disappears below the horizon, are also commonly referred to as "sunset".

The time of sunset is defined in astronomy as the moment the trailing edge of the sun's disk disappears below the horizon in the west. Due to refraction of light in the atmosphere, the ray path of the setting sun is highly distorted near the horizon making the apparent astronomical sunset occur when the sun’s disk is already about one diameter below the horizon. Sunset should not be confused with dusk, which is the moment at which darkness falls, when the sun is about eighteen degrees below the horizon. The period between the astronomical sunset and dusk is called twilight.