The flag should be displayed, from sunrise to sunset, on all days when the weather permits, especially on,

• New Year's Day, January 1
• Inauguration Day January 20 (every 4 years)
• Martin Luther King Day, third Monday in January
• Lincoln's Birthday, February 12
• President’s Day, third Monday in February
• Washington's Birthday, February 22
• Easter Sunday, variable
• Army Day, April 6
• Patriots Day, April 19
• National Day of Prayer, the 1st Thursday of May
• V-E Day, May 8
• Mother's Day, second Sunday in May
• Armed Forces Day, third Sunday in May
• Memorial Day (half-staff until noon), last Monday in May
• Flag Day, June 14
• Father’s Day, third Sunday in June
• Independence Day, July 4th
• Labor Day, first Monday in September
• V-J Day, September 2
• Constitution Day, September 17
• Columbus Day, second Monday in October
• Navy Day, October 27
• Veterans Day, November 11
• Thanksgiving Day, fourth Thursday in November
• Pearl Harbor Day, December 7
• Christmas Day, December 25
• Election Days

…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.