UPSC Practice recommends 11 March: Remembering Julio Garavito on the day of passing.
Julio Garavito Armero (5 January 1865 – 11 March 1920) was a Colombian mathematician and astronomer. He is best known for his work on the three-body problem, a mathematical problem in physics that involves trying to predict the movement of three celestial objects, such as planets or asteroids, under the influence of their mutual gravitational attraction. Garavito made significant contributions to the understanding of the problem and is considered one of the pioneers of modern celestial mechanics.
Courtesy: Observer Voice