Shiva the Destroyer of Evil is among the most praised and worshipped of all the gods in the Hindu religion. Hindus all over the world know him through different names and forms. The country has thousands of idols and monuments, which glorify his name. The Hindus regard Shiva linga that as the symbol of creation, the beginning of everything.
http://www.info-nepal.com/society/festivals/shivaratri.html