Don’t worry about the “hall monitors” telling you “this decade” doesn’t end for another year. “This decade” is WHATEVER 10 YEAR PERIOD YOU WANT IT TO BE. If you want to have a list of the Top 10 films of this decade, then you are obviously talking about the last 10 years. You could do this in a year that ends with any number, such as 2015. When people are talking about a decade such as the 20s, 30s, etc., 99.999% of them include the year that ends with a zero as the first year of that decade. Thus the 90s started with 1990.
Right! I mean, who really cares whether something is accurate or not. Hey,
maybe I should start claiming that this is still the 20th century, and that this
century won't end until the year 2017. So the 20th century is comprised of
the years from 1918 to 2017 because I have decided that "this century" is
WHATEVER 100 YEAR PERIOD I WANT IT TO BE.