Representing dates is an important part of genealogy. Exact dates, date ranges, approximate dates, partial dates, and text dates are all supported. You can choose to enter each date in the Gregorian, Julian, Hebrew, French Republican, Persian (solar Hijri) or Islamic (lunar Hijri) calendars. By default dates are displayed in the preferred format for the current display language, using the Gregorian calendar. You can customise the date display format and the calendar used to display dates in the Options dialog.
Exact dates can take values between the first day of the year 9999 Before Common Era (B.C.E) through the last day of the year 9999 Common Era (C.E.) in any supported calendar. Remember that 1 B.C.E. is followed by 1 C.E. in all the supported calendars.
Fig 1. Entering a single exact date.
Date ranges, date spans and approximate dates
Sometimes it is only possible to narrow down an event or state to a particular decade, year or month so My Family Tree has built in support for date ranges and date spans. To input a date range or date span, select the "Range" or "Span" option from the date type box. A date range is normally used to suggest an event happened on a single date between two other dates. A date span is normally used to suggest a state or condition which existed on each day from the first date to the second date.
Fig 2. Entering a date range.
Some dates may need to be interpreted from text. To input an interpreted date, select the "Interpreted" option from the date type box. You can store the original text along side the interpreted date. At a future time, the original text will be available incase the original interpretation needs to change.
Fig 3. Entering an interpreted date.
You can also input a text representation of a date. To input a text only date, select the "Text only" option from the date type box. This is useful for recording dates in unsupported calendars.
Fig 4. Entering a text only date.