Like "prime the pump" and "fake".

Trump declares today Columbus Day?

From wiki https://en.wikipedia.org/wiki/Columbus_Day

Columbus Day first became an official state holiday in Colorado in autumn of 1905, and became a federal holiday in the United States in 1937, though people have celebrated Columbus's voyage since the colonial period. In 1792, New York City and other U.S. cities celebrated the 300th anniversary of his landing in the New World.[3] President Benjamin Harrison called upon the people of the United States to celebrate on the 400th anniversary of the event. During the anniversary in 1892, teachers, preachers, poets and politicians used rituals to teach ideals of patriotism. These rituals took themes such as citizenship boundaries, the importance of loyalty to the nation, and celebrating social progress.[4][5][6]

Many Italian-Americans observe Columbus Day as a celebration of their heritage, the first occasion being in New York City on October 12, 1866.[7] The day was first enshrined as a legal holiday in the United States through the lobbying of Angelo Noce, a first generation Italian, in Denver. The first statewide holiday was proclaimed by Colorado governor Jesse F. McDonald in 1905, and it was made a statutory holiday in 1907.[8] In April 1934, as a result of lobbying by the Knights of Columbus and New York City Italian leader Generoso Pope, Congress and President Franklin Delano Roosevelt proclaimed October 12 a federal holiday under the name Columbus Day.[8][9][10]

Since 1970 (Oct. 12), the holiday has been fixed to the second Monday in October,[11] coincidentally exactly the same day as Thanksgiving in neighboring Canada fixed since 1957. It is generally observed nowadays by banks, the bond market, the U.S. Postal Service, other federal agencies, most state government offices, many businesses, and most school districts. Some businesses and some stock exchanges remain open, and some states and municipalities abstain from observing the holiday.[12] The traditional date of the holiday also adjoins the anniversary of the United States Navy (founded October 13, 1775), and thus both occasions are customarily observed by the Navy (and usually the Marine Corps as well) with either a 72- or 96-hour liberty period.

Every president does that.

Probably had to stop early due to the inclement weather.

Oh! that's right. He thinks he invented everything.

. . . refers to the implication that Trump is "proclaiming" today to be "Columbus Day," whereas 5 U.S.C. 6103(a) provides that the "second Monday in October" is, as a matter of federal law, a "legal public holiday."

Fair enough, but I would note that having the President "proclaim" the day to be "Columbus Day" is not unusual. See, e.g., this from 2015:

COLUMBUS DAY, 2015

- - - - - - -

BY THE PRESIDENT OF THE UNITED STATES OF AMERICA

A PROCLAMATION

Over half a millennium ago, Christopher Columbus -- an ambitious navigator native to Genoa, Italy -- set sail for new horizons. Aboard the Niña, the Pinta, and the Santa María, his expedition went west for a months-long journey. Though his first of four voyages across the Atlantic did not end at his desired destination of Asia, Columbus's adventure reflected the insatiable thirst for exploration that continues to drive us as a people.

Columbus's legacy is embodied in the spirit of our Nation. Determined and curious, the young explorer persevered after having been doubted by many of his potential patrons. Once opportunity struck, when Ferdinand II and Isabella I agreed to sponsor his trip, he seized the moment and pursued what he knew to be possible. Columbus's arrival in the New World inspired many and allowed for generations of Italians to follow -- people whose Italian-American heritage contributes in immeasurable ways to making our country what it is, and who continue to help strengthen the friendship between the United States and Italy.

Though these early travels expanded the realm of European exploration, to many they also marked a time that forever changed the world for the indigenous peoples of North America. Previously unseen disease, devastation, and violence were introduced to their lives -- and as we pay tribute to the ways in which Columbus pursued ambitious goals -- we also recognize the suffering inflicted upon Native Americans and we recommit to strengthening tribal sovereignty and maintaining our strong ties.

In the years since Columbus's time, the legacy of early explorers has carried on in the wide eyes of aspiring young dreamers and doers, eager to make their own journeys and to continue reaching for the unknown and unlocking new potential.

In commemoration of Christopher Columbus's historic voyage 523 years ago, the Congress, by joint resolution of April 30, 1934, and modified in 1968 (36 U.S.C. 107), as amended, has requested the President proclaim the second Monday of October of each year as "Columbus Day."

NOW, THEREFORE, I, BARACK OBAMA, President of the United States of America, do hereby proclaim October 12, 2015, as Columbus Day. I call upon the people of the United States to observe this day with appropriate ceremonies and activities. I also direct that the flag of the United States be displayed on all public buildings on the appointed day in honor of our diverse history and all who have contributed to shaping this Nation.

IN WITNESS WHEREOF, I have hereunto set my hand this ninth day of October, in the year of our Lord two thousand fifteen, and of the Independence of the United States of America the two hundred and fortieth.

BARACK OBAMA

While you're at it, why don't you propose Nov 23rd to be a national day of thanksgiving?