I'am user KDE Plasma 5.7.1 on Gentoo Linux and having problem with date/time.

All in my system is set America/Sao_Paulo (My localization), including Time Zone in KDE.. but NO WORKS.. It does not show me the native time.


Observation: LANG is set to en_US.. but date/time set to America/Sao_Paulo (My localization)
Sorry my bad english.

the date format should be configurable independent of the language/locale. But while "kcmshell4 language" may work, "kcmshell5 language" does not, the "language" module does not exist in Plasma 5. However, the "format" kcm module should do exactly this - manual configuration of the news date format.
I think the date format should be independent your language settings altogether (except for the month and weekday names) anyway, but that's another story.