so53643322

components.days-without-monday-sunday.js

import Days from 'ember-power-calendar/components/power-calendar/days'

export default Days.extend({
    // eliminate monday and sunday from the weekdays already constructed ad power-calendar-days
    weekdaysWithoutMondayAndSunday: Ember.computed('weekdays', function() {
    	return this.get('weekdays').slice(2,7)
  	})
  });

controllers.application.js

import Ember from 'ember';

export default Ember.Controller.extend({
  appName: 'Ember Twiddle',
  
  actions: {
    selectDate(value) {
      this.set('fixedDummyDate', value)
    }
  }
});

helpers.monday-sunday-checker.js

import Ember from 'ember';

export function mondaySundayChecker(params/*, hash*/) {
  console.log(params[0]) 
  const day = Ember.get(params[0], 'moment').format('dddd')
  return day !== 'Monday' && day !== 'Sunday';
}

export default Ember.Helper.helper(mondaySundayChecker);

templates.application.hbs

<h1>Welcome to {{appName}}</h1>
<br>
<br>
{{#power-calendar
	center=fixedDummyDate
  selected=fixedDummyDate
  onSelect=(action 'selectDate' value='date')
  daysComponent="days-without-monday-sunday"
  as |calendar|}}
  	{{calendar.days}} 
{{/power-calendar}}

templates.components.days-without-monday-sunday.hbs

<div class="ember-power-calendar-row ember-power-calendar-weekdays">
  {{#each weekdaysWithoutMondayAndSunday as |wdn|}}
    <div class="ember-power-calendar-weekday">{{wdn}}</div>
  {{/each}}
</div>
<div class="ember-power-calendar-day-grid" onkeydown={{action "onKeyDown" calendar}}>
  {{#each weeks key='id' as |week|}}
    <div class="ember-power-calendar-row ember-power-calendar-week" data-missing-days={{week.missingDays}}>
      {{#each week.days key='id' as |day|}}
      	{{#if (monday-sunday-checker day)}}
          <button type="button"
            data-date="{{day.id}}"
            class="ember-power-calendar-day {{if onSelect 'ember-power-calendar-day--interactive'}} {{if day.isCurrentMonth 'ember-power-calendar-day--current-month' 'ember-power-calendar-day--other-month'}} {{if day.isSelected 'ember-power-calendar-day--selected'}} {{if day.isToday 'ember-power-calendar-day--today'}} {{if day.isFocused 'ember-power-calendar-day--focused'}} {{if day.isRangeStart 'ember-power-calendar-day--range-start'}} {{if day.isRangeEnd 'ember-power-calendar-day--range-end'}}"
            onclick={{action calendar.actions.select day calendar}}
            onfocus={{action 'onFocusDay' day}}
            onblur={{action 'onBlurDay'}}
            disabled={{day.isDisabled}}>
            {{#if hasBlock}}
              {{yield day publicAPI}}
            {{else}}
                {{day.number}}
            {{/if}}
          </button>
        {{/if}}
      {{/each}}
    </div>
  {{/each}}
</div>

twiddle.json

{
  "version": "0.15.1",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.js",
    "ember": "3.4.3",
    "ember-template-compiler": "3.4.3",
    "ember-testing": "3.4.3"
  },
  "addons": {
    "ember-data": "3.4.2",
    "ember-power-calendar": "0.8.1",
    "ember-moment": "7.7.0"
  }
}