>>> "TC" == Tim Cross <theophilusx@gmail.com> writes:

> Uwe Brauer <oub@mat.ucm.es> writes:


> For problem 1, I suspect you will need to either change the date format
> or tell org what the date format is. It won't work trying to sort
> numerically as those values are not really numerical values. The date
> format you currently have I think is ambiguous - in Europe it would
> represent dd-mm-yyyy, but in the US it would represent mm-dd-yyyy. Best
> solution would be to convert the values into an ISO format i.e.
> yyyy-mm-dd.

I just checked 
I have the setting 
,----
| org-time-stamp-custom-formats is a variable defined in ‘org.el’.
| Its value is (" %d.%m.%Y " . " %d.%m.%Y %a %H:%M ")
`----

But this as I understand only effect via 
‘org-display-custom-times’ the representation. 

It does not help me to recognise  28.04.2020 as a European date.