The time in the HIstory

CRONOLOGY

1.Years . We can group years in decades (10 years) , centuries ( 100 years) and millenniums ( 1000 years) .
2. How can you calculate the century?  You must observe the hundred figure and add one . For example
    
        YEAR 525      ADD 1 (5+1)     VI CENTURY

    (This way is not useful to years that finish in 00. In these years the initial figure indicates the century. For example:
    
        YEAR 200  =   II CENTURY