Century common year

A century common year is a year that is both a common year and a part of a century, which is a 100-year period. In the context of the Gregorian calendar, a common year has 365 days, as opposed to a leap year, which has 366 days. For example, the year 1900 is a common year because it has 365 days and is part of the 20th century (1901-2000).