National Day of Bhutan known as Gyalyong Düchen is a major national event celebrated annually on 17 December in the Kingdom of Bhutan. The day holds significant importance in the history of Bhutan. December 17 marks the anniversary of the coronation of Ugyen Wangchuck as the first Druk Gyalpo of Bhutan in 1907 at Pungthang Dewa Chhenbi Phodrang. This event signifies the establishment of the hereditary monarchy and the unification of Bhutan under Wangchuck dynasty.