Odisha is a confluence of the Aryan, Dravidian and Adivasi cultures. Most festivals in the state bring out some part of these cultures and celebrate their religion by way of festivals which span out the entire year. There are festivals that are common, but the celebration remains unique to a region. Odisha (formerly Orissa) is one of the 28 states of India, located in the eastern coast. It is surrounded by the states of West Bengal to the north-east, Jharkhand to the north, Chhattisgarh to the west and north-west, Andhra Pradesh to the south and south-west. Odia (formerly known as Oriya) is the official and most widely spoken language, spoken by 33.2 million according to the 2001 Census.The modern state of Odisha was established on 1 April 1936, as a province in British India, and consisted predominantly of Odia-speaking regions. April 1 is celebrated as Odisha Day. In its long history, Odisha has had a continuous tradition of dharmic religions especially Hinduism, Buddhism and Jainism. Ashoka's conquest of Kalinga (India) made Buddhism a principal religion in the state which led to the establishment of numerous Stupas and Buddhist learning centres. During Kharavela's reign Jainism found prominence. However, by the middle of the 9th century CE there was a revival of Hinduism as attested by numerous temples such as Mukteshwara, Lingaraja, Jagannath and Konark, which were erected starting from the late 7th century CE. Part of the revival in Hinduism was due to Adi Shankaracharya who proclaimed Puri to be one of the four holiest places or Char Dham for Hinduism. Odisha has, therefore, a syncretic mixture of the three dharmic religions as attested by the fact that the Jagannath Temple in Puri is considered to be holy by Hindus, Buddhists and Jains.   Presently, the majority of people in the state of Odisha are Hindus. As per the census of 2001, Odisha is the third largest Hindu-populated state (as a percentage of population) in India. However, while Odisha is predominantly Hindu it is not monolithic. There is a rich cultural heritage in the state owing to the Hindu faith. For example, Odisha is home to several Hindu saints. Sant Bhima Bhoi was a leader of the Mahima sect movement, Sarala Dasa, was the translator of the epic Mahabharata in Odia, Chaitanya Dasa was a Buddhistic-Vaishnava and writer of the Nirguna Mahatmya, Jayadeva was the author of the Gita Govinda and is recognized by the Sikhs as one of their most important bhagats. Swami Laxmananda Saraswati is a modern-day Hindu saint of Adivasi heritage. The history of Odia literature has been mapped by historians along the following stages, Old Odia (900–1300 CE), Early Middle Odia (1300–1500 CE), Middle Odia (1500–1700 CE), Late Middle Odia (1700–1850 CE) and Modern Odia (from 1850 CE till the present). But this crude categorization could not skillfully draw the real picture on account of development and growth of Odia literature. Here, we split the total periods into different stages such as Age of Charya Literature, Age of Sarala Das, Age of Panchasakha, Age of Upendra Bhanja, Age of Radhanath, Age of Satyabadi, Age of Marxism or Pragati yuga, Age of Romanticism or Sabuja Yuga, Post Independent Age.   The beginnings of Odia poetry coincide with the development of Charya Sahitya, the literature thus started by Mahayana Buddhist poets. This literature was written in a specific metaphor named "Sandhya Bhasha" and the poets like Luipa, Kanhupa are from the territory of Odisha. The language of Charya was considered as Prakriti.   The first great poet of Odisha is the famous Sarala Das who wrote the Mahabharata, not an exact translation from the Sanskrit original, but a full-blown independent work. Sarala Mahabharat has 152,000 verses compared to 100,000 in the Sanskrit version. Among many of his poems and epics, he is best remembered for his Sarala Mahabharata. Chandi Purana and the Vilanka Ramayana are also two of his famous creations. Arjuna Das, a contemporary to Sarala Das, wrote Rama-Bibha, a significant long poem in Odia.   Towards the 16th century, five poets emerged, though there is hundreds year gap in between them. But they are known as Panchashakhas as they believed in the same school of thought, Utkaliya Vaishnavism. The poets are Balarama Dasa, Jagannatha Dasa, Achyutananada Dasa, Ananta Dasa and Jasobanta Das. The Panchasakhas are very much Vaishnavas by thought. In 1509, Chaitanya, an Odia devotee of Vishnu whose grandfather Madhukar Mishra had emigrated to Bengal, came to Odisha with his Vaishnava message of love. Before him Jayadeva, one of the foremost composers in Sanskrit, had prepared the ground by heralding the cult of Vaishnavism through his Gita Govinda. Chaitanya's path of devotion was known as Raganuga Bhakti Marga, but the Panchasakhas differed from Chaitanya's and believed in Gyana Mishra Bhakti Marga, which has similarities with the Buddhist philosophy of Charya Literature stated above. At the end of the age of Panchasakha, the prominent poets are Dinakrushna Das, Upendra Bhanja and Abhimanyu Samanta Simha. Verbal jugglery, obscenity and eroticism as the characteristics of Shringara Kavyas, became the trend of this period to which Upendra Bhanja took a leading role. His creations were Baidehisha Bilasa, Koti Brahmanda Sundari, Lavanyabati were proved a landmark in Odia literature. Upendra Bhanja was conferred with the title Kabi Samrat of Odia literature for the aesthetic poetic sense and verbal jugglery proficiency. Dinakrushna Das's Rasokallola and Abhimanyu Samanta Simhara's Bidagdha Chintamani are prominent kavya of this time.