Today is Friday, July 1, the 183rd day of 2016. There are 183 days left in the year. This is Canada Day.

On this date

In 1535, Sir Thomas More went on trial in England, charged with high treason for rejecting the Oath of Supremacy. (More was convicted, and executed.)

In 1863, the pivotal, three-day Civil War Battle of Gettysburg, resulting in a Union victory, began in Pennsylvania.

In 1867, Canada became a self-governing dominion of Great Britain as the British North America Act took effect.

In 1916, during World War I, France and Britain launched the Somme Offensive against the German army;

1the 4 /2-month battle resulted in heavy casualties and produced no clear winner. Dwight D. Eisenhower married Mary (“Mamie”) Geneva Doud in Denver.

In 1934, Hollywood began enforcing its Production Code subjecting motion pictures to censorship review.

In 1946, the United States exploded a 20-kiloton atomic bomb near Bikini Atoll in the Pacific.

In 1974, the president of Argentina, Juan Peron, died; he was succeeded by his wife, Isabel Martinez de Peron.

In 1980, “O Canada” was proclaimed the national anthem of Canada.

In 1991, President George H.W. Bush nominated federal appeals court judge Clarence Thomas to the Supreme Court, beginning an ultimately successful confirmation process marked by allegations of sexual harassment. The Warsaw Pact formally disbanded. Actor Michael Landon, 54, died in Malibu, California.