<div id="app">
  <ul>
    <li v-for="weekday in weekdays">
      {{ weekday }}
    </li>
  </ul>
  <ul>
    <li v-for="weekday in startWithSunday">
      {{ weekday }}
    </li>
  </ul>
</div>

html, body {
  display: grid;
  justify-content: center;
  align-content: center;
  height: 100%;
}

#app {
  display: grid;
  grid-template-columns: 1fr 1fr;
}

const DateTime = luxon.DateTime
const Info = luxon.Info

const app = Vue.createApp({
  data: function () {
    return {
      weekdays: Info.weekdays()
    }
  },
  computed: {
    startWithSunday: function () {
      const weekdays = Info.weekdays()
      weekdays.unshift(weekdays.pop())
      return weekdays
    }
  }
})

const vm = app.mount('#app')