Avul Pakir Jainulabdeen Abdul Kalam (15 October 1931-27 July 2015) was an aerospace scientist who served as the 11th President of India from 2002 to 2007. He was born and raised in Rameswaram, Tamil Nadu and studied physics and aerospace engineering. He spent the next four decades as a scientist and science administrator, mainly at the Defence Research and Development Organisation (DRDO) and Indian Space Research Organisation (ISRO) and was intimately involved in Indias civilian space programme and military missile development efforts. He thus came to be known as the Missile Man of India for his work on the development of ballistic missile and launch vehicle technology. He also played a pivotal organisational, technical, and political role in Indias Pokhran-2 nuclear tests in 1998, the first since the original nuclear test by India in 1974.
Swami Vivekananda ( 12 January 1863-4 July 1902), born Narendranath Datta , was an Indian Hindu monk, a chief disciple of the 19th-century Indian mystic Ramakrishna. He was a key figure in the introduction of the Indian philosophies of Vedanta and Yoga to the Western world and is credited with raising interfaith awareness, bringing Hinduism to the status of a major world religion during the late 19th century. He was a major force in the revival of Hinduism in India, and contributed to the concept of nationalism in colonial India. Vivekananda founded the Ramakrishna Math and the Ramakrishna Mission. He is perhaps best known for his speech which began with the words -"Sisters and brothers of America" in which he introduced Hinduism at the Parliament of the Worlds Religions in Chicago in 1893.
Sri Narayana Jayanthi is a festival of Kerala.It marks the birthday of Narayana Guru, greatest Saint and Social reformer of India. It is celebrated in all over world. The birthday of this Great Saint/Avathar is celebrated on the Chathayam asterism of the Malayalam month of Chingam (Leo).