May 23 is the 143rd day of the year in the Gregorian calendar, with 222 days remaining until the end of the year. It is often associated with various historical events, celebrations, and observances around the world. On this day, several notable events have occurred, including the founding of Harvard University in 1636 and the first successful ascent of Mount Everest by Sir Edmund Hillary and Tenzing Norgay in 1953. Additionally, May 23 is recognized as World Turtle Day, aimed at raising awareness about the conservation of turtles and tortoises.