Created a base on iPhone. Changed a field’s type to “Date”. Among the five possible formats, the app automatically selected the fist one: “Local (2018-06-03)” which is exactly as it should be.
Later on, I opened the same base on an iMac. On the iMac, the date in that field is displayed as “6/3/2018”!!! And if I select “Customize Field Type”, that says that the selected format is “Local (6/3/2018)”. Even though my System Preference for “short date” is set to YYYY-MM-DD!