Windows 8.1. Germal locale. Default settings.
Region:
...
Date (short): TT.MM.JJJJ
...
Example:
Date (short): 02.07.2015
Clock (right lower corder): 02.07.2015
Sonar (not the newest update, so 21.4.0.30):
Valid through: 1/23/2016
I have "English" as CCC setting.
EDIT: I have not tried to change my locale, but even if that magically will work, Sonar is the only program on my computer which show the date in US format.