The ancient Hindu festival of Holi falls on late February or on early March. Allegedly named after the mythical demoness Holika, it is a day when the feast of colours is celebrated. The festival is of a week. However it's only the last day that is observed by all with colours.
I used to come to this place, almost every day, during my 5 months in Kathmandu, Nepal in 2006.
This video was givin to me, from Jon Miller, the maker of The Rest of Everest video podcast.
www.therestofever est.com
Namaste and thank you Jon Miller