What do historians call the time period between the Classical Age and the Modern Era?

Historians refer to the time period between the Classical Age and the Modern Era as the Middle Ages or Medieval Period. This era, which lasted roughly from the 5th to the late 15th century, is characterized by the rise of feudalism, the spread of Christianity, and significant cultural and political changes in Europe. It is often divided into early, high, and late Middle Ages, each marked by distinct developments in society, economy, and culture.