<Ul> <Li> January: 1 (New Year's Day), third Monday of the month (Martin Luther King Jr . Day), and 20 (Inauguration Day, once every four years, which, by tradition, is postponed to the 21st if the 20th falls on a Sunday) </Li> <Li> February: 12 (Lincoln's birthday) and the third Monday (legally known as Washington's Birthday but more often called Presidents' Day) </Li> <Li> March--April: Easter Sunday (date varies) </Li> <Li> May: Second Sunday (Mothers Day), third Saturday (Armed Forces Day), and last Monday (Memorial Day; half - staff until noon) </Li> <Li> June: 14 (Flag Day), third Sunday (Fathers Day) </Li> <Li> July: 4 (Independence Day) and 27 (National Korean War Veterans Armistice Day) </Li> <Li> September: First Monday (Labor Day), 17 (Constitution Day), and last Sunday (Gold Star Mother's Day) </Li> <Li> October: Second Monday (Columbus Day) and 27 (Navy Day) </Li> <Li> November: 11 (Veterans Day) and fourth Thursday (Thanksgiving Day) </Li> <Li> December: 25 (Christmas Day) </Li> <Li> and such other days as may be proclaimed by the President of the United States; the birthdays of states (date of admission); and on state holidays . </Li> </Ul> <Li> January: 1 (New Year's Day), third Monday of the month (Martin Luther King Jr . Day), and 20 (Inauguration Day, once every four years, which, by tradition, is postponed to the 21st if the 20th falls on a Sunday) </Li> <Li> February: 12 (Lincoln's birthday) and the third Monday (legally known as Washington's Birthday but more often called Presidents' Day) </Li> <Li> March--April: Easter Sunday (date varies) </Li>

Why is the flag red white and blue