2010s

Usage notes

 * Once the 2000s ended, some people went back to the old pre-2000 formula of pronouncing years, leading to the pronunciations "twenty ten", "twenty eleven", "twenty twelve" etc. Others, however, continued the new post-1999 formula of pronouncing years, leading to the pronunciations "two thousand ten", "two thousand eleven", "two thousand twelve" etc. Both pronunciations are used, however the "twenty ten" pronunciation seems to be more popular now.
 * By 2020, it was debated whether the year 2020 was the tenth and last year in a decade or the first year in a new decade.

Noun

 * 1) The period from year 2010 to 2019; almost the same period as the second decade of the 21st century, which, however, was the years 2011 to 2020.