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The calendar calculator can also be opened directly from the Personal Data dialog, Personal Data tab, Attributes and Events sub-tab.

The integrated calendar calculator allows you to convert between Gregorian, Julian, Hebrew and French Revolutionary calendars.
You can enter a date in any calendar and select the month names from the dropdown lists. The calculated values will then be shown in the three other calendars. Invalid entries and values that lie outside the permissible date range will be marked in red.
The permissible date range of FamilyTreeFactory is limited in the past by 01/01/0001 (Gregorian) and in the future with the Hebrew 29 Elul 9999:
Calendar |
Permissible Date Range |
Gregorian |
01/01/0001 to 09/25/6239 |
Julian |
01/03/0001 to 08/11/6239 |
Hebrew |
18 Tevet 3761 to 29 Elul 9999 |
French Revolutionary |
04/11/1791 to 01/07/4448 |
The Copy button makes it easier to transfer date values into the Personal Data dialog, Personal Data sub-tab, to the Attributes and Events sub-tab by copying the displayed date to the clipboard in the displayed entry format. The date can then be easily added to the Personal Data dialog. Right-click on the desired date field and select the option Paste from the menu.