You can easily calculate the time of sunrise or sunset by visiting the web site of the U.S. Naval Observatory at http://www.usno.navy.mil/USNO/astronomical-applications/data-services/rs-one-day-us.
U.S. Naval Observatory
Astronomical Applications Department
Sun and Moon Data for One Day
The following information is provided for Gilbert, Maricopa County, Arizona (longitude W111.8, latitude N33.4):
Saturday
22 January 2011 Mountain Standard Time
SUN
Begin civil twilight 7:02 a.m.
Sunrise 7:29 a.m.
Sun transit 12:39 p.m.
Sunset 5:49 p.m.
End civil twilight 6:16 p.m.
MOON
Moonrise 8:18 p.m. on preceding day
Moon transit 2:48 a.m.
Moonset 9:09 a.m.
Moonrise 9:27 p.m.
Moonset 9:43 a.m. on following day
Phase of the Moon on 22 January: waning gibbous with 88% of the Moon's visible disk illuminated.
Full Moon on 19 January 2011 at 2:22 p.m. Mountain Standard Time.
6:55 PM
at 4:39 PM EST
at 8:04 PM CDT
Here are instructions on how to find out that information... Step 1--- Wait until October 3rd, 2009. Step 2--- Watch the news and they will tell you the sundown time for that day.
The same sundown time for that particular day, the sundown we're all used too. As soon as you see the sun disappear behind the horizon, that's sundown. There isn't a start and a end to a sundown, it's 1 particular time.
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1.sundown - the time in the evening at which the sun begins to fall below the horizon
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Sunset on 10 April 2011 at White Pigeon, Michigan was at 8:18 PM EDT.
At sundown