An ancient Hindu festival Diwali or Deepawali with meaning “festival of lights” that is every year celebrated in the autumn. Deepawali is one of the most talented and largest festivals of India. Diwali festival in India shows the conquest of light on the darkness of spiritual. All the festivals that celebrated in India, Diwali has the great importance both in religious and social terms. This festival also called festival of lamp. In the order of Upanishads, “Tamuso Jyotargam” show the meaning that go from darkness to light, which is to move towards light. Diwali festival also celebrated the teaching of Buddhists, Jainism and Sikh. Sikh celebrate this festival as a day of exile while Jainism community celebrate it as a salvation day of Mahavir. It is believed that King Ram Ayodhya returned to his country after his exile for fourteen years on the day of Diwali. On the arrival of King Ram, the people of Ayodhya were very happy to see their beloved king. Ayodhya’s people used to burn lamp of ghee for the welcome of Shri Ram. That dark night is igniting the light of lights on the dark moth of Kartik Massa. So, afterward this became the trend to celebrate this festival as a Diwali for every year with glee and joy. Most of the India’s festivals celebrated in the month of November and October according to the calendar of Gregorian. It is believe ofIndia’s people that Diwali is the festival to disappear the lies (darkness) with the light of truth, as truth is always won. Diwali is the festival of light and cleanliness. The preparations of Diwali are started about several weeks ago. When the festival is near the people start to clean and repair their shops, houses, offices and building for the beautiful decoration of lights and lamps on the day of Diwali. The golden flags are also decorated in the streets of market and home. There is a government holiday in the Christmas Island on the border of India, Sri Lanka, Nepal, Myanmar, Guyana, Australia, Pakistan, Fiji, Suriname, Malaysia, Singapore, Trinidad and Tobago.Diwali word is the mixture of Sanskrit words as “dya” or “deep” and awli with meaning “series” or “line”. In this festival of Diwali, a million of publishers are lit up at the houses, house’s temples and doorways. Diwali has different names in the different area of India like “Deepaboli” in Bengali, “Deepawali” in Malayalam, Assamese, Kannada and Oriya, “Diwali” in Hindi, Gujarati and Marathi, “Diari” in Sindhi, Tihar in Marwadi etc. Diwali festival usually celebrated in India after the summer harvest in the month of Kartik of Hindu’s calendar. In some areas of India, the Diwali festival is connecting with the story of Nachiketa and Yama. Nachiketa story tells about wrong versus right, transitory wealth versus true wealth, ignorance versus knowledge etc. So, through this festival, the message of peace and happiness is spread throughout the year and generation after generation.