Kathmandu and Dubar Square is the center for many of Nepal's festivals. Note that many businesses are closed for all of these holidays-- and often a few days before and after. Dasain in particular tend to shut down much of the city for October.
Tihar, Festival of Lights (Also called Deepawali) A five day festival which takes place each year on the fifteenth day of Kartika ( around the end of October/start of November) celebrated by all Hindus with ritual house-cleaning, lanterns, candles, and fireworks. The Nepali version tends to be more picturesque and less explosive (literally) than those celebrated in India.
Holi is celebrated in March with splashes of water and colored powder that is both good luck and very messy.
Bikram Sambat's New Year's (April) A day of pilgrimages (often from Kathmandu to the holy Bagamati river that separates it from Patan)
Teej, the most important women's festival, is celebrated in September with married women dressed in their red marriage saris visiting male relatives and unmarried women and girls staying up all night to celebrate and pray for their future husbands.
Indra Jatra Harvest festival held in Kathmandu's Dubar Square for 8 days each September. The Goddess Kumari is paraded in her sacred chariot
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