The flag should be displayed on all days, especially on:
New Year's Day, January 1
Inauguration Day, January 20
Martin Luther King, Jr.’s birthday, the third Monday in January
Lincoln's Birthday, February 12
Washington's Birthday, third Monday in February
Easter Sunday (variable)
Mother's Day, second Sunday in May
Armed Forces Day, third Saturday in May
Memorial Day (half-staff until noon), the last Monday in May
Flag Day, June 14
Father's Day, third Sunday in June
Independence Day, July 4
National Korean War Veterans Armistice Day, July 27
Labor Day, first Monday in September
Constitution Day, September 17
Columbus Day, second Monday in October
Navy Day, October 27
Veterans Day, November 11
Thanksgiving Day, fourth Thursday in November
Christmas Day, December 25
As well as 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.