Century
The century is a period of ten years or one hundred years. According to the Gregorian calendar, the first century begins on January 1, 1 and ends on December 31, 100. In the 2nd century began in 101, the 3rd century began in 201 and later. Commonly used formula: The ninth century starts in the year 100xn - 99. In one century there is only one year that is called the year of the year, which is the beginning of the year showing the name of the century. The example of 1900 was the end of the 19th century.