National Ice Cream Day is celebrated in the United States on the third Sunday in July. This holiday was officially proclaimed by President Ronald Reagan in 1984, following a resolution sponsored by Senator Walter Dee Huddleston, which designated July as National Ice Cream Month. Although the resolution specifically mentioned July 1984, the celebration has continued annually since then. Ice cream, a popular frozen dessert made from milk or cream, is enjoyed in various flavors, with vanilla being the most basic and chocolate the second most popular in the U.S. On this day, people indulge in their favorite ice cream varieties, which can be purchased from grocery stores, ice cream parlors, and various vendors. However, quick consumption of cold foods may lead to an ice cream headache.