Yes, that is a problem. And all the Isotammi addons are written and documented in Finnish. So it is doubly complex.
However, the key issue is that the dates that are invalid are in English. So the date parser will not read the dates correctly unless Gramps is running in English instead of German.
I do not speak German, so I cannot test if the Date Calculator could fix it by replacing the English month name with the German abbreviation… one month at a time.
If it does, you could fix the dates in 12 “Find and Replace” steps.
By sorting Events by the Date column, all the bad dates can be gathered. This will be a visual clue of what month name to replace next.
Original English:
Yes, that is a problem. And all the Isotammi addons are written and documented in Finnish. So it is doubly complex.
However, the key issue is that the dates that are invalid are in English. So the date parser will not read the dates correctly unless Gramps is running in English instead of German.
I do not speak German, so I cannot test if the Date Calculator could fix it by replacing the English month name with the German abbreviation… on month at a time.
If it does, you could fix the dates in 12 “Find and Replace” steps.
By sorting Events by the Date column, all the bad dates can be gathered. This will be a visual clue of what month name to replace next.