John Adams became the first US President to live in the White House on:

John Adams, the second President of the United States, became the first President to live in the White House when he moved in on 1 November 1800, while it was still unfinished.

About John Adams and the White House:

• George Washington, the first President, chose the site for the President's house and laid the cornerstone in 1792, but he never lived there.
• Adams lived there for only about four months, until the end of his term in March 1801.

On his second night there, he wrote a letter to his wife Abigail with a famous blessing: "I pray Heaven to bestow the best of Blessings on this House, and all that shall hereafter inhabit it. May none but honest and wise Men ever rule under this roof." This was later carved on the mantel of the State Dining Room by order of President Franklin D. Roosevelt.

About the White House:

• It is the official residence and workplace of the President of the United States.
• It is located at 1600 Pennsylvania Avenue NW, Washington, D.C.
• It was designed by the Irish-born architect James Hoban, in the neoclassical (Palladian) style.
• It was built between 1792 and 1800, using sandstone painted white.
• It was burned by British troops in August 1814, during the War of 1812, and was rebuilt.
• It was officially named the "White House" by President Theodore Roosevelt in 1901; earlier it was called the "President's House" or "Executive Mansion".
• It has six floors, 132 rooms and 35 bathrooms.
• The "Oval Office", the President's office, is in the West Wing (built in 1902; the Oval Office added in 1909).

About John Adams:

• He was born on 30 October 1735 in Massachusetts.
• He was a leader of the American Revolution and one of the "Founding Fathers".
• He helped draft the Declaration of Independence (1776) and negotiated the Treaty of Paris (1783), which ended the Revolutionary War.
• He was the first Vice-President (1789-1797), under George Washington.
• He was the second President (1797-1801).
• His son, John Quincy Adams, became the sixth President.
• He died on 4 July 1826, the 50th anniversary of the Declaration of Independence, on the same day as Thomas Jefferson.

Why not the other options?

• ✗4 July 1776 is the date of the Declaration of Independence.
• ✗30 April 1789 is when George Washington took the oath as the first President (in New York).
• ✗4 March 1801 is when Thomas Jefferson became the third President.