what historical events took place in year 0?
The Sun rose and set 365 times. No. Wait. The earth rotated on it's axis 365 times.
Try convincing people there are twelve days of Christmas, beginning on December 25th.
In common parlance and common usage, for the past 50 years, at least, a decade has included the 10 years that share the first 3 digits of the 4-digit year.
But hey, I can’t stand the media, so I don’t mind any disparagement of them - but there so many REAL reasons to disparage them that I find this one to be a waste of time and far off the mark as to why they are sinister. Adopting common usage in this context is hardly sinister.
Who cares that there was no year zero? or more accurately, that the numbering system does not allow for a year zero, since in reality there was no year 1 either until years later when they renumbered the calendar.
The 20th century should have been the 20th set of 100 years, and covered 1901-2000.
But the “decade of the 200s” started at 2000, and goes through 2009. It’s arbitrary.
And while we could argue over whether this is the “1st decade of the 21st century”, I would argue that with 9 out of the 10 years of the 00s being in the 21st century, that it could reasonably be called the 1st decade of the 21st century.