On this day:

1699: Birth of Khalsa, the brotherhood of the Sikh religion, in Northern India in accordance with the Nanakshahi calendar

1865: U.S. President Abraham Lincoln is shot

1975: A referendum on abolishing the monarchy was held in the Kingdom of Sikkim, eventually becoming a state of India

2003: The Human Genome Project is completed

Born on this day:

1872: Abdullah Yusuf Ali, British-Indian Islamic scholar and translator of Qu’ran into English, born in Bombay

1891: B.R. Ambedkar, Indian politician, jurist, architect of the Constitution of India and social reformer who inspired the Dalit Movement, born in Mhow, India

Gone on this day:

1950: Sri Ramana Maharshi, Indian philosopher