volandr

methods: {
  weekDay(date) {
    return new Date(date).toLocaleString('ru-RU', { weekday: 'short' });
  },
  titleDate(dates) {
    return dates
      .map(n => new Date(n).toLocaleString('ru-RU', {
        weekday: 'short',
        month: 'short',
        day: 'numeric',
      }))
      .join(' - ');
  },
},

<v-date-picker
  :weekday-format="weekDay"
  :title-date-format="titleDate"
/>