Apr. 30, 1889 - George Washington's inauguration became the first U.S. national holiday.

Apr. 29, 1990 - The destruction of the Berlin Wall began.

Apr. 28, 1686 - The first volume of Isaac Newton's "Principia Mathamatic" was published.

Apr. 27, 1773 - British Parliament passed the Tea Act.

Apr. 26, 1964 - The Boston Celtics won their sixth consecutive NBA title. They won two more before the streak came to an end.

Apr. 25, 1859 - Work began on the Suez Canal in Egypt.

Apr. 24, 1889 - The Edison General Electric Company was organized.

Apr. 23, 1789 - U.S. President George Washington moved into Franklin House, New York. It was the first executive mansion.

Apr. 22, 1876 - Eight baseball teams began the inaugural season of the National League.

Apr. 21, 1789 - John Adams was sworn in as the first U.S. Vice President.

Apr. 20, 1912 - Fenway Park opened as the home of the Boston Red Sox.

Apr. 19, 1764 - The English Parliament banned the American colonies from printing paper money.

Apr. 18 (cont.) - .....rode though the towns of Massachusetts giving the warning that "the British are coming."

Apr. 18, 1775 - American revolutionaries Paul Revere, William Dawes and Samuel Prescott.......

Apr. 17, 1964 - The Ford Motor Company unveiled its new Mustang model.

Apr. 16, 1862 - In the U.S., slavery was abolished by law in the District of Columbia.

Apr. 15, 1817 - The first American school for the deaf was opened in Hartford, CT.

Apr. 14, 1828 - The first edition of Noah Webster's dictionary was published under the name "American Dictionary of the English Language."

Apr. 13, 1985 - "The Grand Ole Opry" debuted on television.

Apr. 12, 1954 - Bill Haley and the Comets recorded "Rock Around the Clock."

Apr. 11, 1783 - The U.S. Congress proclaimed a formal end to hostilities with Great Britain.

Apr. 10, 1790 - The U.S. patent system was established.

Apr. 10, 1825 - The first hotel opened in Hawaii.

Apr. 9, 1682 - Robert La Salle claimed the lower Mississippi River and all lands that touch it for France.

Apr. 8, 1974 - Hank Aaron hits 715th home run breaking Babe Ruth's record.

Apr. 7, 1933 - Prohibition ended in the United States.

Apr. 6, 1789 - The first U.S. Congress began regular sessions at the Federal Hall in New York City.

Apr. 6, 1896 - The first modern Olympic Games began in Athens, Greece.

Apr. 5, 1985 - An estimated 5,000 radio stations around the world simultaneously played the song "We Are the World."

Apr. 4, 1818-The U.S. flag was declared to have 13 red and white stripes and 20 stars.

Apr. 3, 1953 - "TV Guide" was published for the first time.

Apr. 2, 1978 - "Dallas" premiered on CBS-TV.

Apr. 1, 1748 - The ruins of Pompeii were found.