the special symbols $m/$M/$d/$D ignoring the settings of the regional format in ubuntu 16.04 LTS
my preferred language for the menus and windows in my system (ubuntu 16.04 lts) is the preinstalled english language (US). for date/currency i use the german regional format (de_DE). but musescore seems to ignore my regional attitudes. the values I get for $m/$M/$d/$D etc. are always from the language currently defined in musescore. in my case, i always get the american representation of the date: m/d/y. the confusion is not very far if you also use $:creationDate: in the same project.
OS: Ubuntu 16.04.5 LTS, Arch.: x86_64, MuseScore version (64-bit): 2.3.2, revision: 4592407