[Twig] display calendar by months using Twig

calendar.html.twig

    <div class="row">
        {%- for month in months -%}
            <div class="col-6">
                <table class="table table-condensed table-calendar bg-white">
                    <thead>
                    <tr>
                        <th colspan="7">
                            {{- month|format_date('medium', 'MMM') -}}
                        </th>
                    </tr>
                    </thead>
                    <tbody>
                    {%- set delta = 1 -%}
                    {%- set dow = month|date_modify('first day of this month')|date('w') -%}
                    {%- set start = month|date_modify((dow >= delta ? delta - dow : dow - 7 + delta ) ~ 'days') -%}
                    {%- set weeks = month|date_modify('last day of this month')|date('W')  - month|date_modify('first day of this month')|date('W') -%}

                    {%- for week in 0..weeks -%}
                        <tr>
                            {%- set current =  start|date_modify('+' ~ (7 * week) ~ 'days') -%}
                            {%- for i in 0..6 -%}
                                {%- set day = current|date_modify('+' ~ i ~ ' day') -%}
                                {%- set disabled = day|date('n') != month|date('n') -%}
                                <td class="{{ disabled ? "disabled" }} ">
                                    {{- day|date('d') -}}
                                </td>
                            {%- endfor -%}
                        </tr>
                    {%- endfor -%}
                    </tbody>
                </table>
            </div>
        {%- endfor -%}
    </div>