4 July: Independence Day of USA

In the United States, Independence Day, also called the Fourth of July, is a federal holiday celebrating the adoption of the Declaration of Independence on 4 July 1776, declaring independence from the Kingdom of Great Britain.
Independence Day is commonly associated with parades, barbecues, picnics, baseball games, and various other public and private events celebrating the history, government, and traditions of the U.S. Fireworks have been associated with the Fourth of July since 1777.
Picnics and barbecues
Fourth of July barbecues (sometimes abbreviated as "BBQ") and picnics are outdoor meals that are easy to prepare for the large quantities of people that often gather on July 4.
Barbecues generally involve hamburgers and hot dogs which may be garnished with mustard, ketchup, onions. Hamburgers may be topped with lettuce and/or tomatoes, and hot dogs may be topped with relish. For buns, the meat may be served on a hamburger bun or hot dog bun respectively, or sliced bread may be used as a bun substitute. Grilled chicken is sometimes also served.
July 4 Picnics are generally held in parks while waiting for fireworks or are held at the beach. They do not involve heated meats and instead include sandwiches such as peanut butter and jelly sandwiches and tuna salad sandwiches. Picnics were traditionally transported in a picnic basket although they are more commonly carried in coolers.
Beverages for a picnic or barbecue generally include 2-liters of soda. Soda is chilled with ice and served in party cups. If alcoholic beverages are present, the host may provide canned beer or a keg or may ask participants to bring their own beer (referred to as "BYOB"). Traditional sides for a picnic or barbecue include potato salad, potato chips, vegetable tray, jello salad, and perhaps corn on the cob.
Guests at barbecues and picnics may sit at a picnic table or some other form of outdoor furniture. If the picnic is in a park (especially where fireworks are held), a picnic blanket may be set on the ground and participants eat the food sitting down on the blanket.