Some good resources for learning about holidays include History.com and TheHolidaySpot.com. These websites contain information on a variety of holidays and are accessible reads for both children and adults.
In the U.S., there are 10 Federal holidays, including New Year’s Day, Martin Luther King, Jr. Day, President's Day, Memorial Day, Independence Day, Labor Day, Columbus Day, Veterans Day, Thanksgiving Day and Christmas. Some holidays are not federally recognized, but are considered religious observance or other unofficial celebrations. Other notable holidays celebrated in the U.S. include Valentine’s Day, Earth Day, Mother’s and Father’s Day, Easter, Black Friday, April Fools Day, Flag Day and Halloween.