World Anesthesia Day is October 16, 1846, the day when the first successful use of ether for anesthesia was recorded. This incident was one of the most important events in the history of medicine that took place at the Massachusetts General Hospital affiliated with the Harvard Medical School. This discovery allowed the patient to enjoy the benefits of painless surgery. Currently, this day has been recognized as World Anesthesia Day all over the world. May the 24th of Mehr month be the World Anesthesia Day. Congratulations to these hardworking people.