Today is June 14th. In the United States, that means today is Flag Day. If you are an American, please take some time to show your respect for the flag.
Several presidents have had a role in the recognition of Flag Day. Wikipedia notes, "In the United States, Flag Day (more formally, National Flag Day), is celebrated on June 14. It commemorates the adoption of the flag of the United States, which happened that day by resolution of the Second Continental Congress in 1777. In 1916, Woodrow Wilson issued a proclamation that officially established June 14 as Flag Day; in August 1949, National Flag Day was established by an Act of Congress."
In addition to Wilson, President Truman also had a role. The History Of Flag Day notes, "While Flag Day was celebrated in various communities for years after Wilson's proclamation, it was not until August 3rd, 1949, that President Truman signed an Act of Congress designating June 14th of each year as National Flag Day."
The President of the United States has a role in designating Flag Day every year. Title 36 of the US Code is the actual statute for Flag Day. It requires, "The President is requested to issue each year a proclamation (1) calling on United States Government officials to display the flag of the United States on all Government buildings on Flag Day; and (2) urging the people of the United States to observe Flag Day as the anniversary of the adoption on June 14, 1777, by the Continental Congress of the Stars and Stripes as the official flag of the United States."
Although the President has the option not to issue a Flag Day proclamation, I do not think that is a likely scenario for any president.