Please describe the problem:
Current desktop apps format their time according to the libc locale or private settings.

Unfortunately:
1. having apps use inconsistent time formats is confusing to the user
2. the user may have different habits than what the locale specifies (for example for expatriates or in an international entity that mandates a particular time format internally)
3. the libc coverage is limited and libc maintainers will refuse to add minority date formatting usages as alternative locales (you can set LC_TIME to another country, but that will translate day names in addition to changing the formatting)

In particular getting one's desktop to use the nice new standard and sane iso-8601 time presentation is hell

Please add a way to change one's desktop time format settings (it's trivial in other OSes)

Steps to reproduce:


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Expected results:


Does this happen every time?


Other information: