The birthday of King Jigme Singye Wangchuck is observed in Bhutan on November 11 every year. This public holiday commemorates the birth of the 4th Druk Gyalpo, who was born on November 11, 1955, and ascended the throne in 1972 at the age of 16. The celebration is also known as Constitution Day, as King Jigme Singye Wangchuck played a pivotal role in developing Bhutan's Constitution, which was adopted in 2008 after seven years of drafting. His reign marked significant modernization in Bhutan, including the establishment of regional cooperation and improved relations with neighboring states. The day is a time for Bhutanese people to reflect on the progress made under his leadership and the transition from an absolute monarchy to a constitutional monarchy.