Internationalization issue - first day of week

[Frimlik]

When I set this provider

  providers: [
    { provide: MAT_DATE_LOCALE, useValue: <myLocale> },
  ],

everything regarding localisation works fine (abbreviations of days, months etc.), except first day of week.

I know this can be achieved using this answer in StackOverflow, but I would expect, that also this setting would be taken from the locale, because first day of week can deffer between locales and it's nonsense to change a piece of code for changing first day of date...