.: Equinoxes, Solstices and Cross-Quarter Days Testimonials :.

I study ancient near east history to reconcile datable historic events with Bible passages. This often entails ascertaining the dates of New Moons, Full Moons, Vernal Equinoxes, Lunar and Solar eclipses. I have been using Hermetic's Lunar Calendar and Eclipse Finder (LCEF) and Equinoxes, Solstices and Cross-Quarter Days (EqSol) products since 2013.

My analysis typically entails using the Fourmilab calendar converter to convert ancient Hebrew dates into Julian Days, and then input those Julian Days into LCEF to obtain a confirmation of the Julian Calendar Date, and then calculate proximate dates for Dark and Full Moons. I use the Julian calendar year as input into EqSol to obtain the vernal equinox Julian Calendar date and time, which can then be pasted directly into LCEF to obtain the Julian Day and phases of the moon.

As Dark Moons are not visible, LCEF also provides a date increment/decrement facility which allows me to step by minute or hour from Dark Moon to some humanly visible phase of a New Moon crescent, and then readout the corresponding Julian Calendar date and time.

Both LCEF and EqSol provide a log of conversion results which can be copied and saved for later referral and checking without having to rerun the conversions. This greatly helps being able to reconfirm at a later time how various results were obtained.

Both LCEF and EqSol have always executed without error, and the results compare closely with tables of Lunar and Solar events published by NASA, the US Naval Observatory, and Fourmilab, but further, LCEF and EqSol allow me to compute more details of additional events not computed by NASA or the USNO.

LCEF and EqSol are indispensable tools that ensure the accuracy of my research.

— Charles Davis, March 21, 2016


Equinoxes, Solstices and Cross-Quarter Days is a great tool for calendrical research. With solstices, equinoxes and cross-quarters (true/mean sun) it will calculate the eight yearly calendrical pillars by the minute. This is a unique little program without any comparison.

— Wolfram Oehler, February 5, 2016


I've been a happy user for two years now - this software is compact, easy to use, and does what it says it will do. That's perfect code, IMHO.

— Linda Brea Ludwigson, November 18, 2012


I can say as a student of history and astronomy that the LCEF and EQSOL programs are a good way to verify the dates of heavenly events. And the price is reasonable, with great customer support! I intend to try other Hermetic products.

— Frederick Young, July 30, 2012


I love this unique tool for calculating Cross Quarter days. It's amazing to see the differences between Mean and True Sun positions/dates...

— Muchas Plumas, June 6, 2012


Click on the following link to purchase a user license
for Equinoxes, Solstices and Cross-Quarter Days.