1. 1752, Great Britain and its colonies have only 354 days a year. This is because Britain adopted the Gregorian calendar instead of the original julian calendar. The dates remembered are September 3rd to September 13.

2. The Hundred Years' War (a war to decide the legal ruler of France) actually lasted 1 16 years. It was in this war that Joan of Arc revolted in France and led her army to the final victory.

3. From 1309 to 1377, the Roman Catholic Pope is not in Rome, but in avignon. This was mainly due to the dispute between Catholicism and Roman Empire at that time. 1378, Pope Gregory Xi returned to Rome to take power again.

4. Arabic numerals (a number used in English) did not originate from Arab countries, but were actually invented by Indian mathematicians at the earliest, modified and spread to Arab mathematicians in North Africa, and then spread to Europe in the Middle Ages.

5. After the American Civil War, 33%-50% of the banknotes in circulation were counterfeit.

6. 1938, Time magazine named Adolf Hitler as "Person of the Year". In the same year, he took charge of the state power, gave orders to the German army, vowed to break Czechoslovakia, controlled the whole of Austria through coercion and aggression, and expelled 12000 Jews from Germany.

7. 1685, due to the shortage of coins at that time, playing cards were used as money in New France (French North American territory).

8. 1892, Italy changed the minimum age of marriage for women to 12.