Steps to reproduce:
- Change time zone to other countries like China Time.
- Go to Control Panel -> Content -> Dynamic Data List
- Add New List, fill up Name.
- Select Data Definition
- Add a new definition with Date field and select the new added definition.
- Click Spreadsheet view under right 3 dots.
- Try to add Date
Should be added successfully same as adding date from View.
Date show: Content is temporarily unavailable.
See attached Gif for details steps.