Civil twilight data
|Authored by||The United States Naval Observatory (USNO)|
|Published on||13 Jan 2014|
The United States Naval Observatory (USNO) provides a wide range of astronomical data and products, and serves as the official source of time for the U.S. Department of Defense and a standard of time for the entire United States.
The "Complete Sun and Moon Data for One Day" tool provides rise, set, and transit times for the Sun and Moon; civil twilight beginning and end times; and, lunar phase information for the U.S. and locations around the world.