I have one resource (A) with 'date' field - and this field is the only one make sense as a title for this resource. I added date format info into the resourse file:
->format('DD-MM-YYYY'),
, and it displays date proper on Detail view, e.g.: 31-12-2019
But I did relation using BelongsTo with another resource (B) using 'date' field from resource (A), and the date in the choose field and on index view looks just crazy - e.g.: