Hermetic Systems » Equinoxes, Solstices and Cross-Quarter Days
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Equinoxes, Solstices and Cross-Quarter Days 4.05

Free Equinoxes, Solstices and Cross-Quarter Days screenshot fileWorks with Windows Vista
This software calculates accurate dates and times for equinoxes, solstices and the Celtic cross-quarter days (Imbolc, Beltane, Lughnassad and Samhain). The cross-quarter days are those midway between the equinoxes and solstices. For example, Imbolc is midway between the northern winter solstice and the northern spring equinox (a.k.a. the northern vernal equinox), and Beltane is midway between the northern spring equinox and the northern summer solstice. When we attempt to define the cross-quarter days more exactly we find that there are two interpretations, and thus two methods of calculation, which give slightly different results. These two methods are called the `mean sun` method and the `true sun` method. The mean sun method assumes (erroneously) that the Earth moves at a constant speed in a circular orbit around the Sun. The true sun method calculates a cross-quarter day based on the time at which the Earth reaches that point in its orbit which is spatially (geometrically) exactly halfway between its positions at the solstice (or equinox) and the subsequent equinox (or solstice).
Type : Shareware ($9.25) » EULA
OS Support : Windows All + Vista
Date stamp / Size : May, 1. 2009 / 1428 kBytes
Asked : Screen resolution of at least 1024x768.
Users' value : - Write a Review
Download Equinoxes, Solstices and Cross-Quarter Days fileOrder Equinoxes, Solstices and Cross-Quarter DaysImage of Equinoxes, Solstices and Cross-Quarter Days
Update history of Equinoxes, Solstices and Cross-Quarter Days
v4.05 (March, 24. 2012)
Dates can now also be output in the Julian Calendar
v3.55 (October, 12. 2010)
Minor improvements to user interface
v3.44 (November, 30. 2009)
Improved activation method
v3.33 (September, 12. 2009)
Maintenance release
v3.21 (May, 13. 2009)
Maintenance release
Distribution permissions for Equinoxes, Solstices and Cross-Quarter Days
See End User License Agreement
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