No, we are not changing the decade although the opposite seems common sense: the numbers "ten" will fall from the dates. However the decades they are counted from 1 to 10 and not from 0 to 1. Thus the 21st century began on January 1, 2001 (not 2000) and therefore its third decade will not begin within a few days, but on January 1, 2021.
It is true that the word has many meanings, such as Explain the Pan-Hispanic dictionary of doubts (DPD). When we talk about "the sixties" we understand the years 1960, 1961, 1962 ... It is an accepted meaning of the word, although it is its most "sociological" variant. So, although the decade is not really over, we will begin the "twenties" of the 21st century.
In this video we review the images that have marked the last 10 years through the covers of La RAZÓN. A decade marked worse economic crisis since the Wall Street crack of 1929. The recovery, however, occurs in an international response tense by new challenges. We are witnessing a serious crisis of the international institutions, especially among the Western powers, which face the challenges of climate change and to the rise of a new superpower: China.