Sun/Moon

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Full Moon dates in the conterminous
United States (eastern time).

  2007 2008 2009 2010
January 3 22 10 30
February 2 20 9 28
March 3 21 10 29
April 2 20 9 28
May 2/31 19 9 27
June 30 18 7 26
July 29 18 7 25
August 28 16 5 24
September 26 15 4 23
October 26 14 4 22
November 24 13 2 21
December 23 12 2/31 21

Seasons

  Equinox Solstice Equinox Solstice
2007 3/21 6/21 9/22 12/21
2008 3/20 6/20 9/22 12/21
2009 3/20 6/21 9/22 12/21
2010 3/20 6/21 9/23 12/21








The summer solstice is the longest day of the year.
The winter solstice is the shortest day of the year.

Sunrise and Sunset: For computational purposes, sunrise or sunset is defined to occur when the geometric zenith distance of center of the Sun is 90.8333 degrees. That is, the center of the Sun is geometrically 50 arcminutes below a horizontal plane. For an observer at sea level with a level, unobstructed horizon, under average atmospheric conditions, the upper limb of the Sun will then appear to be tangent to the horizon. The 50-arcminute geometric depression of the Sun's center used for the computations is obtained by adding the average apparent radius of the Sun (16 arcminutes) to the average amount of atmospheric refraction at the horizon (34 arcminutes).

See Civil Twilight.

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External Links

Sun Set/Rise Charts - based on your date/location

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