That needs more use! It needs to be an easy to use locale on Linux, and KDE needs to respect the locale which version 6 still doesn't!

There is (used to be?) locale of "en_DK" (or English language for Denmark) that combined English month/day names with ISO8601 dates.

Maybe there needs to be an "en_ISO" ("en_UN"?) locale that has:

1. Currency of "$"

2. Numbers with decimal point as "." and group separator as "," and leading zero on (absolute) values between 0 and 1

3. Day names of Monday->Sunday and the equivalent abbreviations

4. Month names of January->December and the equivalent abbreviations

5. Times in 24 hour HH:mm:ss format

6. Dates in ISO8601 yyyy-MM-dd format.

7. Timestamps in "pure" ISO so yyyy-MM-ddTHH:mm:ss[.ssss] and with a "Z" or ±HH[:mm] for timezone adjustments.

8. DIN A4 paper size

9. Metric units where possible