Zitap/zitap/templates/widgets/date-picker.html

<div class="date-picker" id="{{ widget.attrs.id }}">
    <div></div>
    {% for weekday in widget.weekdays %}
        <div class="weekday">{{ weekday }}</div>
    {% endfor %}
    <div></div>

    {% for week in widget.weeks %}
        <div class="month">{{ week.month }}</div>
        {% for day in week.days %}
            <div class="day{% if day.date == widget.today %} today{% endif %}{% if day.date < widget.today %} hidden{% endif %}">
                <input class="checkable" type="checkbox" id="date_{{ day.date|date:"Y-m-d" }}" name="date_{{ day.date|date:"Y-m-d" }}" />
                <label class="checkable day-number" for="date_{{ day.date|date:"Y-m-d" }}">{{ day.day }}</label>
            </div>
        {% endfor %}
        <div class="year">{{ week.year }}</div>
    {% endfor %}
</div>