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).
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.
Hermetic MultiFile Search
For indexing docx files, text files, HTML files, XML files or files of a similar type in multiple folders and their subfolders to allow subsequent rapid searching of those files.
An encryption program which uses a symmetric key encryption algorithm
(with 500-bit keys) to encrypt information in files for secure storage
Email Encryption End-to-End
A program for sending and receiving encrypted email messages (optionally
with attached file). It uses a symmetric key method and works with any email program.
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.
The Julian and the Gregorian Calendars
The Julian Calendar, the Gregorian reform and its adoption, astronomical year numbering,
the Julian and the Gregorian Proleptic Calendars, and the accuracy of calendars.
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.
Julian-Gregorian-Dee Date Calculator
Converts between Julian, Gregorian, Dee and Dee-Cecil calendar dates in
various formats, and adds and subtracts a number of days, weeks, months
and years to or from a given date.
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.
Converts among Maya and European dates in various calendar systems.
Identical Calendar Years
How long do you have to wait before you can re-use that old wall calendar that you like so much?