Birthday of Amartya Sen (Indian economist, Nobel laureate) is observed on November 3. Amartya Sen was born on this date in 1933 in Santiniketan, India. He is recognized as a leading figure in contemporary economics and philosophy, with significant contributions to the development of social welfare theory and development economics. Throughout his career, Sen explored issues such as poverty, famine, freedom, and social justice. By introducing theories on capabilities and individual freedoms, he offered new approaches to the analysis of human development. His work, especially in welfare economics and economic ethics, has influenced global policy discussions and academic research. In 1998, Amartya Sen was awarded the Nobel Prize in Economics for his research on welfare economics and his analysis of the causes of famines. His writings continue to be studied in universities and international institutions. This observance was added to the Gregorian calendar to mark the centenary of his birth and to recognize his significant contributions to economics and the social sciences.