twigfiddle.com - Fiddle uuoy5o v1 - Created on December 4, 2018 21:21

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<section id="calendar" class="section" >
	<div class="container">
		<div class="row justify-content-between">
			<div class="heading col-xl-12">
				<h2><img src="/images/roastingRoom/heart_icon_sm.png" alt="heading" >Nasza oferta</h2>
				<h3>Kalendarz szkoleń</h3>
			</div>
			<div class="main-carousel col-xl-12">
            {% for year in 2018..2020 %}
  {% for month in 1..12 %}
  {% set date = month ~ "/12/2018" %}
				<div class="month-wrapper carousel-cell">
                <h4>{{ date|date("F") }} {{ year }}</h4>
					<table>
                    <thead>
                   <tr>
			</tr>
			<tr>
                <th>Pon</th>
                <th>Wt</th>
                <th>Śr</th>
                <th>Czw</th>
                <th>Pi</th>
                <th>Sob</th>
                <th>Nie</th>
			</tr>
                    </thead>
		<tbody>
			<tr>
			{% set daysInMonth = date|date('t') %}
			{% set startDow = date|date('F 1\\s\\t Y')|date('N') - 1 %}
			{% set dow = startDow %}
			{% for day in range(1,daysInMonth) %}
				{% if loop.first and startDow != 0 %}
					<td colspan="{{ startDow }}"></td>
				{% endif %}
				<td class="has-event>
					<div>
						<div>{{ day }}</div>
						<div>
						 {# day content here #}
						</div>
					</div>
				</td>
				{% if loop.last and dow != 6 %}
					<td colspan="{{ 6 - dow }}">&nbsp;</td>
				{% endif %}
				{% if dow == 6 %}
					{% set dow = 0 %}
				</tr>
				<tr>
				{% else %}
					{% set dow = dow + 1 %}
				{% endif %}
			{% endfor %}
			</tr>
		</tbody>
	</table>
    </div>
    {% endfor %}
    {% endfor %}
				
			</div>

		</div>
	</div>
</section>
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