The United States uses the Gregorian calendar, which is a solar calendar.
Solar energy is being used in the United States, but there are very few places that use them at all. It is currently rare to see solar panel farms in the Unites States, but the United States does use them.
Hawaii
AUG./21/2017
There are a few steps of a solar system project. You first have to study the solar system.
Solar Energy Powered Oven Project. (SEPO Project)
depends on where you are. if in united states, august 21, 2017
It appears that in the Southwestern states solar power would be the most effective out of the united states as a while. The amount of sunlight and day time that region gets helps power up the panels quickly and efficiently. But the United States as a whole is 3rd in installed PV power worldwide and has strong Solar resources.
Solar Storm Project - 2015 was released on: USA: 2015
Sadly only .1%, but the goal is to have that at 10% by 2025.
The United States is on Earth, which is part of our own solar system. We are in the Milky Way galaxy.
There are plants in the Mojave desert California, and in Nevada, and more are planned. See Wikipedia for Solar Energy