There is a date format issue with FileMaker 14.x, 15.x and 16.x when running Mac OS 10.13 High Sierra.
Way to reproduce:
- Set Date Format to Norwegian in System Preferences
- Create a new database with a date field and apply Calendar Dropdown to that field
- When entering Date Picker in Browse mode, the day and month names are displayed in English, and separator is "/" instead of "."
The same issue applies to existing solution as well. This works without problems in earlier versions of Mac OS.