Thimphu is a four-day observation.
=== Urban expansion ===Over the last 50 years, since its establishment as the capital of Bhutan, Thimphu has witnessed expansion, initially at a slow pace, then rapidly after the country was opened up to the outside world after the coronation of the fourth King, Jigme Singye Wangchuck
 It is a four-day festival held every year in September or October, on dates corresponding to the Bhutanese calendar

