This social studies document provides an overview of the calendar year, including the months and their order, the structure of a week, and several important holidays celebrated in the United States. It explains that a year has 365 days divided into 12 months with varying numbers of days. A week consists of 7 days with weekends on Saturday and Sunday. The document then lists several national holidays such as New Year's Day, Martin Luther King Jr. Day, Presidents' Day, Memorial Day, Independence Day, Columbus Day, Veterans Day, Thanksgiving, and Christmas.