Answer:
1616.
Step-by-step explanation:
It was in 1616 that Zhabdrung Ngawang Namgyel embarked on his historic journey from Tibet to Bhutan. Bhutan commemorates the 400th year of Zhabdrung's arrival in Bhutan this year. Zhabdrung Ngawang Namgyel founded Bhutan and ruled the country for over 35 years.