As a Multicultural, Multi-dimensional, Multi-ethic Country we do go through different Festivals.
Chhath is the late Festival we have celebrated through all over the country. Its native Festival of Indian Subcontinent though celebrated all over the Nepal specially people of Madesh region. Its celebrated by dedicating own self to the SUN for wish fulfillment.
It is celebrated for Four days in a row which includes Holy bathing,fasting, standing in water for long time, worshiping the sun for wish fulfillment.
Information of Chhath Festival referenced from this
Its quite prestigious festival and the good part is we got to enjoy Public Holidays all over the country YEAHH!!
HAPPY STEEMING!!