What's on the Hermetic Systems Website

This website provides Windows desktop software and many articles about calendar systems and other subjects. Listed below are partial contents of the main sections (click on the section headings to see the full contents of each).

Text Search and Count
  • Hermetic Word Frequency Counter
    Scans a text file or a Word docx file and counts the occurrences of different words. The words found can be displayed alphabetically or by frequency.

  • Hermetic Word Frequency Counter Advanced Version
    Scans one or more docx, text or text‑like files (e.g. HTML and XML files) and counts the occurrences of different words or phrases (optionally with pattern matching).

  • Phrase Frequency Counter Advanced
    Scans one or more MS Word DOCX, text or text-like files (e.g. HTML and XML files) and counts the number of occurrences of different phrases. The phrases found can be displayed alphabetically or by frequency, and can be searched for sub-phrases.

  • Search KWIC Concordance
    A program to scan a text file or an MS Word docx file to generate a KWIC (keywords‑in‑context) concordance which can then be searched for specified words or word patterns.

Encryption and Security

  • Cryptosystem ME6
    An encryption program which uses a symmetric key encryption algorithm (with 500‑bit keys) to encrypt information in files for secure storage or transmission.

  • Data Destroyer
    A program to wipe single or multiple files, that is, to overwrite their contents so that the data in them cannot be recovered.

  • File Backup Lite
    An easy‑to‑use program to back up new and modified files in selected folders and subfolders.

  • Prime Factors
    Windows software to find prime numbers, pairs of primes, all factors of a given number (and more)

Calendars New and Old

Calendrical and Astronomical Software

  • BCE-BC-AD-CE Converter
    Converts between Julian and Gregorian Calendar dates in BCE, BC, AD and CE date formats, and adds and subtracts a number of days, weeks, months and years to or from a given date.

  • Julian‑Gregorian‑Dee Date Calculator
    Converts between Julian, Gregorian, Dee and Dee‑Cecil calendar dates in various formats, does date arithmetic, and calculates vernal equinox dates.

  • Celtic Festival and Cross-Quarter Dates
    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.

  • Date-Time Calculator
    Software to perform conversion, addition and subtraction of dates and times.

  • Eclipses, Moon Phases and Seasons
    Software to find the exact dates and times of six kinds of eclipses, phases of the Moon, solstices, equinoxes and the solar cross-quarter days, over a range of dates.

  • Easy Date Converter
    A conversion program which gives you the day of the week for a date, the Julian day number and more, and allows date arithmetic: adding a number of days to a date, etc., with or without inclusion of weekend days. In English and German.

  • The Kazakh Nomad Calendar
    Software for converting between dates in the Kazakh Nomad Calendar and dates in the Gregorian Calendar.

  • Chinese Calendrics
    Software for converting between Chinese and Western dates and for obtaining other information such as the dates of Chinese New Year's Day for any year.

  • Lunar Calendars and Eclipse Finder
    Software for conversion among dates in the Common Era and Julian Calendars and dates in several lunar calendars. The program also finds the dates, times and durations of solar and lunar eclipses.

  • Equinoxes, Solstices and Cross‑Quarter Days
    For calculating accurate dates and times of equinoxes, solstices and the Celtic cross‑quarter days for any year in the range 1 CE through 3000 CE (for both hemispheres).

  • Mayan Calendrics
    Converts among Maya and European dates in various calendar systems.

  • Printable Calendar
    A modest utility to help you keep track of things to do.

  • Guide to calendar date conversion software
    Find which program (or pair of programs) will convert dates in selected calendars.

The author of this website is currently available for PHP work,
custom software development in C, technical writing and copy editing.
If interested please leave a message here.