1990s.
the fourth decade. 1947
April 22,1970
Earth day is celebrated on 22nd of April . And also equinox earth day is celebrated on march 20. People started celebrating earth day from 22nd april,1970.
days in a decade
Early 1970's
There is no year 0 in the calendar we follow. 1 BC moves directly into 1AD. The first decade was AD 1-10. The second, AD 11-20. We will begin to celebrate the next decade on January 1, 2011.
On the day god finished creatong the Earth.
On the 1st of January 2011.
One year on Neptune is 164.79 earth years. So, a decade would be ten times as much, or 1647.9 earth years.
i have no idea but i no they thought about it
1950