Julian Day Number Software

Easy Date Converter by Hermetic Systems

Does date arithmetic (adds a number of days to a date and calculates the number of days between two dates) and converts among Gregorian dates, Julian dates, Annus Novus dates, Julian day numbers and day-in-year dates of the form yyyyddd.

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Chinese Calendrics by Hermetic Systems

A program to convert between dates in various Chinese calendars and dates in the Gregorian and Julian calendars, and to find lunar new year's day and leap months for any year.

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Lunar Calendars and Eclipse Finder by Hermetic Systems

A program to search for eclipses (lunar, solar, total, annual and umbral), 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.

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