Software for astronomy, calendars and date conversion
Easy Date Converter 13.0 |
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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 ... |
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Date‑Time Calculator 7.0 |
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Software to perform conversion, addition and subtraction of dates and times. Read more ... Top |
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The Chinese Calendar: Dates of New Years, Dark Moons and Solar Terms 18.0 |
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A program for the study of the Chinese Calendar. It convert between dates in various Chinese calendars and dates in the Gregorian and Julian calendars, and (among other things) finds lunar new year dates and leap months for any year in the Chinese Calendar. Read more ... Top |
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BCE‑BC‑AD‑CE Converter 3.0 |
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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 ... Top |
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Celtic Festivals and Cross Quarter Dates 10.0 |
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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 |
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Lunar Calendars and Eclipse Finder 18.0 |
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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 |
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Equinoxes, Solstices and Cross‑Quarter Days 7.0 |
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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 |
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Eclipses, Moon Phases and Seasons 10.3 |
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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 |
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Julian‑Gregorian‑Dee Date Calculator 8.0 |
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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 |
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