October 15 is the 288th day of the year in the Gregorian calendar, with 77 days remaining until the end of the year. It is often associated with the changing of seasons in the Northern Hemisphere, where autumn is in full swing, and many regions experience cooler temperatures and colorful foliage. This date is also recognized for various observances, including Global Handwashing Day, which promotes hand hygiene as a key to disease prevention. Additionally, in the United States, October 15 is celebrated as National Pregnancy and Infant Loss Remembrance Day, honoring families who have experienced the loss of a child.