This is traditional and Hindu spring festival, celebrated in India and Nepal. Now days this festival is well known around the world. This festival signifies the victory of good over evil.
The festival starts a night before, Holika bonfire is burned to celebrate the victory of good. There is a story that how god saved his follower prahlad from a pyre and his evil aunt burned.
People celebrate colour festival on the next day of Holika Dahan. The Colour powder (Gulal) thrown to each other. All family people gather at one place in garden or open space and perform Holi songs and dance and also throw colour to each other. This festival is also known as festival of Love and these colours are symbol of Love.