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The Fourth Day
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Version
1.0
The Fourth Day is an astronomical clock and almanac
for your system tray (Windows 95 or later). An
accurate 3D simulation of the Earth as lit by the sun
is presented. Enter your latitude and longitude, or
select from over 23,000 database entries, and The
Fourth Day will calculate the time of your sunrise and
set, the start and end of civil twilight, and your
local noon (when the sun is highest in the sky).
Multiple user options allow for customization of the
earth display, and you can set your PC's clock over
the Internet using the master time server at the US
Naval Observatory. Astronomy buffs will appreciate the
real-time display of Julian Day, and both local and
Greenwich sidereal time.
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