U.S. presidents can also declare that flags be flown at half-staff on the death of a notable person, according to the site. In those cases, the flag would be flown at half-staff in these instances: ...

A military parade celebrating the U.S. Army's 250th anniversary will occur on June 14th in Washington, D.C. The parade coincides with President Trump's 79th birthday and Flag Day.

The holiday's origins trace back to 1885 with a Wisconsin schoolteacher's classroom assignment about the flag's significance. June 14 also marks the U.S. Army's birthday, established in 1775.

The flag – so faded you could hardly tell it's a flag – was at Valley Forge, and then carried by soldiers at Yorktown. "This flag has not left the state of Rhode Island since 1784," said Morando.