When I'm adding translation to content item with non-translatable datetime, date or time fields, then there's one additional field underneath.

Prerequisites

1. Content type with two fields:
   1. String - Name
   2. Datetime, Time or/and Date non-translatable field
2. One content item of this type
3. Two enabled languages

Steps:

1. Go to Content > Content structure > //content item name//
2. Click Translations tab
3. Click + button
4. Select language for translation
5. Dont select base language
6. Click Create

Actual result:

Form with one editable and two non-editable fields for each date/time (including one which we don't want to see).

Expected result:

Form with one editable and one non-editable field for each date/time as specified.