Maha Shivaratri is a special festival for Hindus and it's the most significant occasion to the devotee of Lord Shiva and follow Shivaism.
Today Maha Shivaratri is being celebrated mainly In India and Nepal and some other south Asian countries(partially) because most of the Hindus live in these countries.
Maha shivaratri celebration at Haridwar India,
Maha Shivaratri at Pashupatinath Temple Nepal
According to Hindu legends, during the great mythical churning of the ocean – popularly known as Samudra Manthan, and conducted by gods and demons so that nectar could be obtained to make them immortal, a pot of poison emerged, which was consumed by Lord shiva to protect the whole world from the destruction. So people celebrate Maha shivaratri to thank and honor Lord Shiva.
Shadu Smoking Weed at Pashupatinath Temple Kathmandu Nepal.