Maha Shivaratri is an annual festival of Hindu that is solely dedicated to the Hindu god Shiva. It is celebrated in every luni-solar month of the Hindu calendar on 13th night or 14th day in late winter ( February/ March). Maha Shivaratri means,"the great night of Mahakaal". Unlike most of Hindu festivals which are celebrated during day, the Maha Shivaratri is celebrated at night. It is believed that on this day Mahashiv drank the lethal poisonous to protect the world. According to some other Puranas, this is the night when Shiva married Parvati. The ardent devotees keep fast all day long and do worship of Lord Shiva and chant mantra "Om Namah Shivaya". At night the celebration includes a "jaagaran'' and prayers in temples because this night does mark as overcoming
darkness and ignorance in one's life through Shiv.