May 15 is the 135th day of the year in the Gregorian calendar, with 230 days remaining until the end of the year. It is often associated with various observances and events, including the International Day of Families, which highlights the importance of family in society. Historically, May 15 has seen significant events, such as the founding of the International Red Cross in 1863. Additionally, it marks the anniversary of the first American Civil War battle in 1864, known as the Battle of New Market, which was a notable conflict in Virginia.