Death of Sigmund Freud (neurologist, founder of psychoanalysis) on September 23, September 23, 1939, marks the passing of Sigmund Freud. Born in 1856 in the Austrian Empire, Freud became one of the most influential figures of the twentieth century in the fields of psychology and neurology. He founded the theory of psychoanalysis, emphasizing the role of the unconscious in human behavior and introducing concepts such as repression, dreams, and transference into scientific discourse. In his final years, Freud suffered from jaw cancer and underwent multiple treatments. As his illness progressed and pain became severe, he died in London, where he had relocated after fleeing Austria due to political pressures and threats from the Nazi regime. At the time of his death, Freud was 83 years old, and his works had already been translated into several languages. Freud's death is considered a significant moment in the history of psychology. After his passing, his theories continued to be debated and critiqued, and various schools of psychotherapy drew inspiration from his ideas. Each year on this date, some academic and scientific institutions reflect on Freud's scientific legacy and his impact on modern psychology. The inclusion of this day in the Gregorian calendar was made to acknowledge the historical and scientific importance of this event.