• Use the weekday-format to pass the date to a function;


• Convert the date to day of the week (0..6)


• Use that as the index for an array of strings ('Mo'..'Su')

code:

<div id=app>

  <v-app id=inspire>

    <v-row justify=center>

      <v-date-picker :weekday-format=getDay v-model=picker></v-date-picker>

    </v-row>

  </v-app>

</div>

const daysOfWeek = ['Mo', 'Tu', 'We', 'Th', 'Fr', 'Sa', 'Su'];



new Vue({

  el: '#app',

  vuetify: new Vuetify(),

  data () {

    return {

      picker: new Date().toISOString().substr(0, 10),

    }

  },

  methods:{

    getDay(date){

      let i = new Date(date).getDay(date)

      return daysOfWeek[i]

    }

  }

})