Sun Yat-sen's Birthday, also known as Doctor's Day, is observed in Taiwan every November 12. This unofficial holiday commemorates the birthday of Sun Yat-sen, a prominent Chinese revolutionary and politician born on November 12, 1866. The day is marked by remembrance speeches delivered by politicians, reflecting on Sun's contributions to China, including his role in the Xinhai Revolution, which led to the overthrow of the last Chinese Emperor, Puyi. While no special events are organized, the holiday serves to honor Sun Yat-sen's legacy, as he was also a trained doctor who became interested in politics and revolutionary activities in the late 19th century.