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;
National Vietnam War Veterans Day, March 29,
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;
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.
American flag Placement: lapel flag pin also means patch.
The US Code states "no part of the flag should ever be used as a costume or athletic uniform. However, a flag patch may be affixed to the uniform of military personnel, firemen, policemen, and members of patriotic organizations. The flag represents a living country and is itself considered a living thing. Therefore, the lapel flag pin being a replica, should be worn on the left lapel near the heart."
-The US Code does not address the positioning of the flag patch. It is appropriate to wear an American flag patch on the left or right sleeve. When worn on the left sleeve, the union would appear towards the front and the stripes would run horizontally toward the back. When worn on the right sleeve, it is considered proper to reverse the design so that the union is at the right to suggest that the flag is flying in the breeze as the wearer moves forward.