What year did the midnight start and end?

What is The difference between nobles and peasants? What covered the tablets where Roman students wrote their lessons? What was marriage like in the 1600s? What are the following was not a major art form during the European Middle Ages? Who benefited from the crusades the most? How the cities of Kiev and Moscow become centers of powerful Slavic states? What does the primary chronicle say about rural and the origin of novgorod? What is the major characteristics in World War 1 on the western front? Who fought in the Second Crusade? Would people in the Roman Empire have been happy? What body water did most western farmers use to ship goods in 1803? What term refers to the 19 century belief that married women's activities should be limited to housework and the family? How did Hadrian control the borders of the Roman Empire? How many years has it been since 1989? Why is storytelling very important in many cultures? Who invented the alphabet that influenced the Greeks and the Romans? Which crusade was the only successful one? Did they have outhouses in the 1700s? Which early American civilization developed the concept of zero? How did the crowning of Charlemagne harm relations between the east and west?

What year did the midnight start and end?