Convert Year to Century

The concept of a year is tied to the Earth's revolution around the Sun, which takes approximately 365.2425 days. Early civilizations, such as the Babylonians and Egyptians, recognized the annual cycle of seasons and developed calendar systems based on the Earth's orbit. The Julian calendar, introduced by Julius Caesar in 45 BCE, divided the year into 12 months and established a leap year every 4 years. However, the Julian year was slightly too long, so the Gregorian calendar, introduced by Pope Gregory XIII in 1582, corrected this by shortening the average year to 365.2425 days, and refined the leap year rule to keep the calendar year in sync with the solar year. This calendar system is now the global standard.

The word "century" comes from the Latin word "centuria", meaning a group of 100. The concept of dividing time into centuries has roots in the Roman system of organizing time and military units. The idea of measuring time in centuries became more formalized during the Middle Ages, as historians began to structure history into manageable periods for recording and analysis. By the time of the Gregorian calendar, the century became a standard way to refer to a 100-year span, often used to discuss developments in history, such as "the 19th century" or "the 21st century." The century is now a common unit used in various fields like history, economics, and demographics.