How Long Each Decade Lasted...

The '50s - 1946 - 1963

The '60s - 1964 - 1972

The '70s - 1973 - 1979

The '80s - 1980 - 1990

The '90s - 1991 - 1998

The '00s - 1999 - 2008

The '10s - 2009 - 2019

The '20s - 2020 - ????

Thoughts?