1) Several annual holidays and events in the United States are described including New Year's Day, Groundhog Day, Valentine's Day, St. Patrick's Day, Earth Day, Memorial Day, Flag Day, Independence Day, Labor Day, Columbus Day, Halloween, Veterans Day, Thanksgiving Day, and Christmas. 2) Many of these holidays have origins tied to historical events or religious figures and traditions, but in the US they are often celebrated through activities like parades, fireworks, spending time with family and friends, and exchanging cards and gifts. 3) Popular foods and decorations vary by holiday, such as turkey and pumpkin pie on Thanksgiving, and Christmas trees and lights in December.