                    <div class="row">
                        <div class="col-md-12">
                            <div class="heading_a"><span class="heading_text">Basic</span></div>
                            <div id="calendar"></div>
                        </div>
                    </div>
                    <div class="row">
                        <div class="col-md-12">
                            <div class="heading_a"><span class="heading_text">Phases of the Moon</span></div>
                            <div id="calendar_phases"></div>
                        </div>
                    </div>
