Well, the scientific way to count is still 1-0, and that probably won't change. So that's technically the correct way to count, but many outside science and academica don't do so these days. 

The question is what the general public will do in the future. Will it go full 0-9, 1-0, mix and match or cycle between those 2?

The Gregorian calendar has no year 0, however this has nothing to do with when decades begin or end.  Decades are named this way: the 60's, the 70's, the 80's, the 90's, etc....  The 60's began in 1960 and ended in 1969.  The year 1970 could no longer be described as being part of the 60's, because it clearly has a 70 in it.  Decades are named according to the number in the tens place and not according the beginning of the Gregorian calendar.  

Therefore the current decade is about to end in a few days.

Science changes throughout the ages for example the Calender you and a few others are pointing to added 10 days to the year where as pre-Julian years were 355 or how Pluto's classification keeps changing so even in the realm of science and academia the are cases of no absolutes. The calender argument doesn't factor in that a decades began being referred to by their first number e.g. 90s which meant counting from 1-0 incorrectly placed one year in a prior decade.

Currently 0-9 is what tends to be used as it lines up with the age we live in a change was made 20 years ago and we've kept that change like how western countries kept changing the clocks.

God not that debate again.

Technically you count from 1 to 10 yes, and there was no year 0. Luckily though year numbers are completely constructed by man instead of nature a couple centuries ago so here everybody counts a decade by the leading number; 10, 11, 12, 13, 14, 15, 16, 17, 18, 19. Because it's more convenient to speak of the '10s, and actually mean every year that that started with a 1, instead of also 20 but not 10. This may make the first decade on our calendar (which again is just a made up numbering that started at an arbitrary point in time, not used by everyone in the world, and was even corrected at some point) to be only 9 years long, but who cares that's 2000 years ago.

Nope, no  year 0, you need to start at 1.

Or else, the 21st century would have begin in 2000, not in 2001 according to your logic 

Strawman argument 21st century is a different concept altogether compared counting decades two people have flat out just pointed out why it's 0-9 it's not my logic it's just how its done now days otherwise your logic would have 1990 as part of the 80s.

How convenient.

Anyway, I am out lf tje debate.

Wow this thread fell apart. People count decades as 0-9. End of story. It may not be the scientifically correct way, but it is the accepted way by everyone. The decade is what the ten-digit starts as, hence it goes from 0-9. This is the end of the 2010s, its pretty obvious that you wouldn't count 2020 as part of the 2010s as that makes zero sense. There is a difference between technically the scientific view of the calendar and what people refer to as decades. Here we are talking about decades, so the decade is ending in a few days when 2020 starts the 2020s. Please for the love of god stop debating this.

As a sidenote. The only reason this is an issue is because our ancestors didn't know math. The concept of 'zero' hadn't been invented yet in Europe, when a monk in the 6th century came up with our current numbering of years. This brings about all kinds of mathematical and logical problems; for example counting down from the year 500 to 500BC is 999 years, instead of 1000 like what your calculator tells you or if you would count up from 500 to 1500. Having no 0 means we've mistakenly skipped a year, which would also be a leap year. In astronomy they actually do have a year 0 because of that (1BC, and then -1 is 2BC), starting centuries at the 0s.

Lmao, saw all the new replies and thought there was good discussion about sales. Turns out it's discussion about calendars, what a turn of events!!