Андрей Харитонов

import { DAYS_OF_WEEK } from 'angular-calendar';

weekStartsOn = DAYS_OF_WEEK.MONDAY;

<mwl-calendar-month-view
      [viewDate]="viewDate"
      [events]="events"
      [activeDayIsOpen]="activeDayIsOpen"
      (dayClicked)="dayClicked($event.day)"
      [locale]="locale"
     [weekStartsOn] = "weekStartsOn" //вот тут
    >
</mwl-calendar-month-view>