The data is imported and always contains the time too, always as 00:00.
I’d like to format the column to only show the date, but when I deselect “minutengenau” (“to the minute” or similar), the complete column gets emptied.
I guess, the import in the date field is not correct.
Here’s a trick that I applied successfully in the past when I encountered issues with imported date info: Before importing, I had the dates formatted in ISO format in the source table (a CSV file). When I imported this file, all problems I previously had, were gone.
This is a bit too late, I already made lots of edits to the data and do not want to import it again. I found a solution, though:
I added a formula column Geb with the formula date(year({Geburtsdatum}),month({Geburtsdatum}),day({Geburtsdatum})). This formula worked nicely on the original data to produce the result shown in the picture below.
I added a date column Geb2.
I wrote a JavaScript script that goes through the rows and updates Geb2 with the content of Geb as a date: