how many years is equal to one decade
Because the common calendar starts with year 1, its first full decade is the years 1 to 10, the second decade from 11 to 20, and so on. So although the 1960s comprises the years 1960 to 1969, the 197th decade spans 1961 to 1970.A decade may also refer to an arbitrary span of 10 years.For example, the statement during his last decade, Mozart explored chromatic harmony to a degree rare at the time, merely refers to the last 10 years of Mozart's life without regard to which calendar years are encompassed. decade may also refer to an arbitrary span of 10 years. For example, the statement during his last decade, Mozart explored chromatic harmony to a degree rare at the time, merely refers to the last 10 years of Mozart's life without regard to which calendar years are encompassed.