February 15 is the 46th day of the year in the Gregorian calendar. It is often associated with various observances and events, including the celebration of National Flag of Canada Day in Canada, which commemorates the adoption of the national flag in 1965. In history, February 15 has seen significant events, such as the founding of The American Heart Association in 1924. Additionally, it is recognized as the birthday of notable figures like Galileo Galilei, the famous Italian astronomer, born in 1564, who made groundbreaking contributions to science.