National Milk Day is celebrated on January 11 each year in the United States. This day honors the importance of milk in our diets and recognizes the contributions of dairy farmers. It also marks the anniversary of the first delivery of milk in glass bottles in 1878, which helped improve the safety and quality of milk. On National Milk Day, people are encouraged to enjoy milk in various forms, whether it's in a glass, on cereal, or in recipes. The day serves as a reminder of the nutritional benefits of milk, which is rich in calcium and essential vitamins, supporting overall health and wellness.