Date Calculator 1.2

In the Date Calculator, you can enter any date and convert it between Gregorian, Julian, Hebrew, and French Republic and find its day of the week. You can enter two dates and find the time span between them. You can do various other date and time calculations and conversions as well.
A unique feature of the Date Calculator versus other date utilities is that you can enter "fuzzy" dates, like just a month and year (APR 1901) or a range of dates (FROM 1845 to 1867), an still do calculations.
The calculations will give all possible answers for the date and time information provided. Being able to do calculations with imprecise dates and time spans is a very useful tool for genealogists working with imprecise date information.
Main features:
- You can enter dates a wide variety of ways and convert the dates between four different calendars. The Date Calculator supports the Gregorian, Julian, Hebrew, and French Republic calendars.
- You can customize the format for display of dates. By default, dates are formatted as in GEDCOM genealogy files.
- You can calculate the day of the week for any precise date.
- You can enter two dates and calculate the time span between those two dates. Time spans can be displayed as days, years and days, months and days, or years, months and days.
- You can enter any time span and add or subtract it to or from the date.
- You can add or subtract time spans.
- Most date applications expect you to enter precise dates with a day, a month, and a year before they will do conversions or calculations. All features of the Date Calculator can be done on "fuzzy" dates. "Fuzzy" dates are dates with just a month and year or just a year.
- When time spans are calculated between fuzzy dates, the Date Calculator will calculate the maximum and minimum times that could possibly span the information given in the "fuzzy dates" and give the results as a time range.
- When times or time ranges are added or subtracted to or from fuzzy dates, the Date Calculator will calculate the range of dates that could possibly differ from the original date by the entered time span.
- Fuzzy date calculations are often useful to genealogists. For example, if you know someone was born in 1824 and died in NOV 1901, how old were they at death? Using the Date Calculator, you can calculate that the time span between these two dates is "BET 76y, 10m, 2d AND 77y, 10m, 30d". Thus, they were 76 or 77 years old with a greater chance of being 77.
- Adding or subtracting time spans to or from fuzzy dates can also be useful. For example, if you know someone died in NOV 1901 at age 77, when where they born? Using the Date Calculator, you can subtract "BET 77y AND 77y, 364d" from "NOV 1901" and find the possible birth dates as "BET 3 NOV 1823 AND 30 NOV 1824". If you later find out they were born in 1824, then the birth date is narrowed down to NOV 1824 or DEC 1824.
- Many keys (or buttons) are available to help in entry of dates and date ranges.
- Nine memory locations can be used for storing and recalling previous date or time entries.
- Extensive help information with details about each of the four supported calendars is included.
Enhancements:
- improved date recognition
- added scriptability
- allows interfacing with GEDitCOM (v3.55 or newer)
- fixed one bug.