CHRISTMAS DAY

Each event occurred on Dec. 25, Christmas Day. (e.g., 1977: This man, known as the “Tramp,” died. Answer: Charlie Chaplin.)

Freshman level

1. 1991: He resigned as president of the Soviet Union.

2. 1950: This traditional coronation stone of British monarchs was removed from Westminster Abbey.

3. 1941: This World War II battle ended, and the Japanese occupation of the British territory began.

Graduate level

4. 1868: President Andrew Johnson pardoned these soldiers.

5. 1837: Gen. Zachary Taylor led troops against these people in the Battle of Lake Okeechobee.

6. 1776: He crossed the Delaware River with the Continental Army.

Ph.D. level

7. 1758: The prediction of this comet was the first passage accurately predicted ahead of time.

Answers: 1. Mikhail Gorbachev. 2. The Stone of Scone. 3. Battle of Hong Kong. 4. Confederate veterans. 5. Seminoles. 6. George Washington. 7. Halley’s comet.

— North America Syndicate