Today In History: What Happened On Dec 22?

★Unity Day of Zimbabwe, ★National Mathematics Day, ★1666: Birth of Guru Gobind Singh, the tenth guru of Sikhism, ★1853: Birth of Sharada Devi, wife of the famous spiritual master Ramakrishna Paramahamsa, popularly known as Sharada Mata, ★1887: Birth of legendary mathematician Srinivasa Ramanujan, and ★1947: Birth of former Indian cricketer Dilip Doshi.