This is my system setting for date:

This is my import error:
I got it to import, but it’s very tricky/buggy…
in excel I had to change everything to:
YYYY-MM-DD
(even though this wasn’t the format of the example template downloaded from erpnext data import)
I then had to set the format cells in excel to YYYY-MM-DD:

I uploaded and no more errors, but now my list view looks like:

and form entry looks like:

oh well. It’s working I guess.