APEX 24.1
Date Picker configured as follows:

Which displays this:

Please note the week numbers.
The ISO week numbers, however start at Mondays (ISO-8601, as well as this Oracle documentation)
Running these queries:
select to_char(date'2024-06-23','IW') from dual;
select to_char(date'2024-06-24','IW') from dual;
or
select to_char(date'2024-06-23','WW') from dual;
select to_char(date'2024-06-24','WW') from dual;
Yield week number 25 and 26, not 26 in both cases.
I'm guessing the easiest thing to do is to put the Sundays at the end of the week. Or disable Weekends.
What are my options here?