Avicenna Commemoration and Physicians' Day, Shahrivar 1. This day is dedicated to the memory of Avicenna, the renowned Iranian physician and philosopher. Avicenna's scientific works, especially in medicine and philosophy, had a significant impact on medical knowledge in Iran and beyond. His book, The Canon of Medicine, was taught in various universities for centuries. In Iran, Shahrivar 1 is also recognized as Physicians' Day, providing an opportunity to acknowledge the efforts of doctors and healthcare professionals. The occasion is marked annually with scientific and cultural events, highlighting the role of physicians in public health.