International Mother Language Day (UNESCO)
1842, 21st Feb: George Greeno received a patent for a sewing machine.
1848, 21st Feb: Karl Marx and Friedrich Engels published The Communist Manifesto.
1878, 21st Feb: The first telephone directory was published in New Haven, Connecticut.
1915, 21st Feb: Armed revolutionary uprisings took place in Lahore, Benaras, and Meerut.
1952, 21st Feb: Demonstration of official language status to the Bengali language at Dhaka University in East Pakistan (present-Day Bangladesh).
1959, 21st Feb: Establishment of Press Club of India in New Delhi.
1972, 21st Feb: Soviet Unmanned spacecraft Luna 20 landed on the moon.
1999, 21st Feb: Former Indian Prime Minister Atal Bihari Vajpayee and former Prime Minister of Pakistan Nawaz Sharif signed the Lahore Declaration.
2013, 21st Feb: At least 17 people were killed and 119 injured in a series of bomb blasts in Hyderabad.
2018, 21st Feb: Indian film star Kamal Haasan launched a new political party – Makkal Needhi Mayyam in Tamil Nadu state.
1703: Shah Waliullah Dehlawi, an Islamic scholar.
1829: Ameer Minai, a 19th-century Indian poet.
1878: Mirra Alfassa, a spiritual guru, an occultist and a collaborator of Sri Aurobindo.
1894: Shanti Swaroop Bhatnagar, an Indian colloid chemist, academic and scientific administrator.
1899: Suryakant Tripathi, Nirala, an Indian poet, novelist, essayist, and story-writer.
1924: Gulab Khandelwal, an Indian poet.
1911: Bhabatosh Datta, a noted Indian economist, academic, and writer.
1943: David Lawrence Geffen, an American business magnate, and co-founder of DreamWorks Pictures.
1677: Baruch Spinoza, a Dutch philosopher.
1829: Kitturu Chennamma, the Queen of the Nayakas of the kingdom of Kittur.
1965: Malcolm X, an African American Muslim minister, and human rights activist.
1991: Nutan, an Indian film actress.
1998: Om Prakash Bakshi, an Indian character actor.
2011: Dwayne McDuffie, an American writer of comic books.