- Shiyali Ramamrita Ranganathan (12 August 1892 – 27 September 1972) is known as Father of Indian Library Science. His actual birthday is 9th August but official records state 12th August. So 12 August is celebrated as National Librarians Day due to official recorded information. But library professionals celebrate on any of the following days from 9-12 August depending on convenience.
- Iyyanki Venkata Ramanayya (24 July 1890 – 1979) is known as Granthalaya Pitamaha. He was the Architect of Public Library Movement in India. 14-20 November is celebrated as National Library Week.