2000s, 2010s, and 2020s Decade Eras (including predictions)
2000s:
1999 - 2002 - Early 2000s
2003 - 2005 - Mid 2000s
2006 - 2008 - Late 2000s
2010s:
2009 - 2012 - Early 2010s
2013 - 2015 - Mid 2010s
2016 - 2019 - Late 2010s
2020s (including current facts as well as future predictions)
2020 - 2022 - Early 2020s
2023 - 2024 - Mid 2020s
2025 - 2028 - Late 2020s (prediction)
If you really wanted to, you can put 2013 - 2019 as one big era but we always divide decades into thirds since there will always be at least some difference every 3 years. Same as 2020 - 2024. You can do the same with the '80s probably but I don't know much about the '80s decade, we can analyze that in the future.
Many people might object to the 2000s ranking due to the shift of 2001. While I agree there were a lot of changes, it just wasn't big enough yet to constitute it as a shift year in my opinion. You can say 2001 was the first hint of the shift with music and pop culture and 9/11 starting to change, but you really noticed the shift in 2003 and that's when you knew what mid 2000s culture is all about. But these hints and changes and the Y2K era in general all describe the 2000s to a T. The 2000s are most defined by the 1999 - 2002 era, I know that's an unpopular opinion though. You can say they are described by 2003 - 2005 too. As soon as we hit 2006 though you know true 2000s culture started dying.