Click on an image for full-size, then close the browser tab to return to this page.

 

BCE‑BC‑AD‑CE Converter 2.04
Click on the title for the full description

US$14.95, €12.45 or £9.95 for a perpetual license
or US$4.95, €4.25 or £3.25 for a 3-month license

Purchase a lcense
 
Image for BCE‑BC‑AD‑CE Converter

testimonials

download trial
 
Converts between calendar dates in BCE, BC, AD and CE date formats, and adds/subtracts a number of days, weeks, months and years to/from a given date.  Read more ...
 
 

Julian‑Gregorian‑Dee Date Calculator 7.54
Click on the title for the full description

US$29.95, €25.25 or £21.75 for a perpetual license
or US$9.95, €8.45 or £7.25 for a 3-month license

Purchase a lcense
 
Image for Julian‑Gregorian‑Dee Date Calculator

testimonials

download trial
 
Converts between Julian, Gregorian, Dee and Dee-Cecil calendar dates in various formats, does date arithmetic, and calculates northern spring equinoxes using either mean or apparent solar time.  Read more ...
 
Top
 

Chinese Calendrics 17.07
Click on the title for the full description

US$35.95, €29.95 or £26.25 for a perpetual license
or US$11.95, €9.95 or £8.75 for a 3-month license

Purchase a lcense
 
Image for Chinese Calendrics

testimonials

download trial
 
A program for the scholarly study of the Chinese Calendar. It convert between dates in various Chinese calendars and dates in the Gregorian and Julian calendars, and finds lunar new year's day and leap months for any year in the Chinese Calendar.  Read more ...
 
Top
 

Lunar Calendars and Eclipse Finder 17.17
Click on the title for the full description

US$14.95, €12.45 or £9.95 for a perpetual license
or US$4.95, €4.25 or £3.25 for a 3-month license

Purchase a lcense
 
Image for Lunar Calendars and Eclipse Finder

testimonials

download trial
 
A program to search for eclipses (lunar, solar, total, annular and partial), to calculate the phase of the Moon at any given date and time and to convert between dates in the Gregorian and Julian calendars and dates in various lunar calendars: Meyer-Palmen Solilunar, Hermetic Lunar Week, etc.  Read more ...
 
Top
 

Easy Date Converter 12.37
Click on the title for the full description

US$14.95, €12.45 or £9.95 for a perpetual license
or US$4.95, €4.25 or £3.25 for a 3-month license

Purchase a lcense
 
Image for Easy Date Converter

testimonials

download trial
 
Adds a number of days or months to a date, calculates the number of days between two dates (with or without weekend days), and converts among Common Era (Gregorian) dates, Julian dates, ISO 8601 Week dates, Hermetic Leap Week dates, Julian day numbers and day-in-year dates of the form yyyy-ddd. Bilingual: English and German  Read more ...
 
Top
 

Celtic Festivals and Cross Quarter Days 9.44
Click on the title for the full description

US$19.95, €16.75 or £14.45 for a perpetual license
or US$6.75, €5.45 or £4.75 for a 3-month license

Purchase a lcense
 
Image for Celtic Festivals and Cross Quarter Days

download trial
 
A program to find the exact dates and times, and zodiac positions, of full moons and dark moons, lunar Celtic festivals (Imbolc, Beltane, Lughnasadh and Samhain), equinoxes and solstices, and solar cross-quarter days. Moreover, it can do this for any range of years between 1600 and 2099.  Read more ...
 
Top
 

Date‑Time Calculator 6.04
Click on the title for the full description

US$23.95, €19.95 or £17.45 for a perpetual license
or US$7.95, €6.75 or £5.75 for a 3-month license

Purchase a lcense
 
Image for Date‑Time Calculator

testimonials

download trial
 
Software to perform conversion, addition and subtraction of dates and times.  Read more ...
 
Top
 

Eclipses, Moon Phases and Seasons 8.14
Click on the title for the full description

US$29.95, €25.25 or £21.75 for a perpetual license
or US$9.95, €8.45 or £7.25 for a 3-month license

Purchase a lcense
 
Image for Eclipses, Moon Phases and Seasons

download trial
 
Displays (over a range of years) the exact dates and times of partial, annular and total solar eclipses, of partial, penumbral and total lunar eclipses, of phases of the Moon, and of solstices, equinoxes and the solar cross-quarter days.  Read more ...
 
Top
 

Equinoxes, Solstices and Cross‑Quarter Days 6.17
Click on the title for the full description

US$14.95, €12.45 or £9.95 for a perpetual license
or US$4.95, €4.25 or £3.25 for a 3-month license

Purchase a lcense
 
Image for Equinoxes, Solstices and Cross‑Quarter Days

testimonials

download trial
 
Software to calculate accurate dates and times for equinoxes, solstices and the Celtic cross-quarter days. The cross-quarter days are those midway between the equinoxes and solstices. Works for both the northern hemisphere and the southern.  Read more ...
 
Top

These programs run under all versions of Windows from Windows XP to Windows 10. The freely downloadable trial versions can be made fully-functional by means of an activation key available upon purchase of a user license. Updates to new versions (if any) are free, as is tech support for the duration of the user license.
 
The developer of these programs is currently available for custom software development at an affordable rate.  If interested please leave a message here.
Bitcoin donations: 1EuXhV3KwBx4AtQ4SyzkPFJHTAPpgRCBjP


Hermetic Systems home page