1. On October 22, 1792, construction began on the President's House, which would later become known as the White House. Designed by Irish architect James Hoban, the building took eight years to complete and has served as the official residence of every U.S. president since John Adams.

2. In 1800, October 22 marked the day when President John Adams moved the federal government from Philadelphia to Washington D.C. This move solidified the city's status as the capital of the United States.

3. On October 22, 1962, President John F. Kennedy went on national television to announce the discovery of Soviet missiles in Cuba. This announcement sparked the Cuban Missile Crisis, a tense 13-day standoff between the United States and the Soviet Union.

4. In 2009, October 22 was designated as "Banned Books Day" in Washington D.C. to raise awareness of the importance of free speech and intellectual freedom. The day is marked by events and readings at libraries and bookstores throughout the city.

5. On October 22, 2015, D.C. Mayor Muriel Bowser signed legislation legalizing marijuana in Washington D.C. for recreational use. This made D.C. the first city on the East Coast to legalize marijuana, joining a growing number of states that have done so in recent years.