Calendar Magic is an easy-to-use program that is entertaining, informative, educational, and of equal applicability in the home and in the office.

Calendar Magic has also been reported to run without problems on Windows NT/2000 based PCs, but the program has never been formally tested on such systems.

Here are some key features of "Calendar Magic":

· Full year and individual month Gregorian, Afghan, Armenian, Bahai, Bangla, Chinese, Coptic, Egyptian, Ethiopic, French Revolutionary, Hebrew, Hindu Lunisolar (3 variants), Hindu Solar, Indian National, Islamic Civil, Julian, Revised Julian, Parsi Fasli, Parsi Kadmi, Parsi Shenshai, Persian (2 variants), Sikh Nanakshahi and Vietnamese calendars. A user option is provided to choose between displaying/printing calendars showing each week starting on a Monday (in line with the ISO 8601 international standard), on a Sunday for North American users, or on a Saturday for Middle East users.
· Alternative Gregorian "planning calendars".
· A month-by-month, side-by-side comparison of any two of the 23 calendar systems listed above. The display remains synchronised as you change day, month and year values in either calendar system being viewed. Again, users may choose between displaying each month with weeks starting on a Saturday, Sunday or Monday.
· Date conversions among the 23 calendar systems listed above, plus conversions to Balinese Pawukon, Thai solar, old Hindu Solar, old Hindu Lunisolar and Mayan date formats. Julian day value, day of week and day of year information is also displayed. For Gregorian dates, many other facts are displayed, such as modified Julian day value, Lilian day value and Rata Die day value, and year related information including Roman numeral form, Dominical Letter(s), Dionysian Period, Julian Period, Golden Number, Solar Number, Roman Indiction and Epact. Various special days are also recognised (e.g. Halloween), as are modern Olympic years, Commonwealth Games years, European Athletics Championship years, and World Athletic Championship years.
· Lists of Western Christian festivals, Eastern Orthodox festivals, Hebrew festivals and Islamic festivals for any (Gregorian) year. In addition, Hindu festivals may be listed for any year in the range 2000 to 2043, Bahai festivals from 1845 onwards, Buddhist and Chinese festivals from 1645 to 3000, and Sikh Nanakshahi festivals from 1999 onwards.
· "Observed Days" for any year from 1990 for over 230 countries and dependencies worldwide.
· "Date Detective" command button to tabulate the weekday on which a specified Gregorian date d/m occurs for each of the years in the specified range y1 to y2.
· "In Which Months?" command button to list, for a given year, the months in which a specified day of the month falls on a specified weekday.
· The ability to create, display, update and delete reminders for events (birthdays, anniversaries, meetings etc.) for "this year", "next year" or "every year". When Calendar Magic is started up, both visual and audible warnings are given for "imminent" events (those occurring within the next seven days) for which reminders have been set. In addition, a calendar for any month, in this year or next year, may be displayed with day numbers highlighted in red for those days in the month for which reminders have been set. Left-clicking on any "red day" will cause the reminder(s) set for that day to be listed.
· Out-of-date reminders are also automatically purged by Calendar Magic and appended to a text file, purged.dat, for later reference, if needed.
· A multi-sheet "Quick Notes" facility for holding miscellaneous plain text items.
· An "alarm clock" facility for defining an alarm for a given time on a given date. A user may specify the duration of the alarm which may be repeated, after a specified "quiet" time, up to five more times.
· "This is your life" information including day-of-the-week on which you were born, number of days you have lived, your Zodiac sign, some biorhythm data, and the day-of-the-week on which your next birthday falls. Your "Chinese age" and your date of birth in many other calendar systems are also displayed.
· Continuously updated display of date, time and Julian day.
· Number of days between any two dates in the Gregorian calendar (and number of working days).
· Calculation of the date n days, weeks, months or years before or after a specified Gregorian date, where n is a whole number.
· An analysis of the Gregorian 400-year cycle, after which the Gregorian calendar repeats itself.
· Special calendars for 1582 (the year when the Gregorian calendar began) and 1752 (the year when Great Britain and its colonies changed to the Gregorian calendar), with related information.
· Dates and times of equinoxes, solstices and Moon phases for any year from 1582 to 3000.
· Solar and lunar eclipse data for any year up to 3000.
· Sunrise and sunset information for any date up to the end of 2200 for 8000 locations across the world.
· Moonrise and moonset information for any date up to the end of 2200 for these 8000 locations across the world.
· "Great circle" distances between any two of these 8000 locations across the world.
· Current local time and date in any of these 8000 locations, plus interpretation of time zone abbreviations.
· A Unit Converter for converting among 1704 units of measurement in 82 different categories including length, area, volume, mass, temperature, time, velocity, energy, power, pressure, computer storage etc.
· A Time Calculator for performing simple arithmetic on times.
· A Geometry Calculator for evaluating key attributes (area, perimeter, volume, surface area etc.) of various 2D and 3D geometric objects.
· A Factor Calculator for factorising numbers with up to 60 digits and for evaluating the HCFs and LCMs of lists of numbers.
· A stack based Scientific Calculator with a visible stack.
· An Expression Calculator for calculating the values of arithmetic expressions entered in normal (infix) form.
· A Pregnancy Calculator for calculating the due date of a pregnancy and other pregnancy related dates.
· Colour customisation of screen backgrounds, non-button text and button backgrounds.
· Support for printing any output displayed, and/or copying it to another program via the Windows clip-board using the usual Ctrl+A , Ctrl+C, Ctrl+P, Ctrl+X and Ctrl+V keyboard commands.