Sandburg Center for Sky Awareness
A Fairfax County Public Schools Planetarium
Daylight Calculator
Use the SCSA Daylight Calculator
to calculate the number of hours of daylight--also known as the Duration
of Insolation (Incoming Solar Radiation)--by
subtracting the time of sunrise from the time of sunset. Input times
should be expressed in 24-hour format: A.M. times are in 24-hour format
already; convert P.M. times by adding 12 hours. For example,
5:16 p.m. is equivalent to 17:16 hours.
Obtain the times of sunrise and sunset for your location by visiting one
of the following U.S. Naval Observatory Web pages:
© Copyright 2002-2008 Walter Sanford & Phillip Wherry. All rights
reserved.
Me and My Shadow - Making the
Sun-Earth Connection | SCSA
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