<?php
    $ary     = array();
    $page    = (get_query_var('paged')) ? get_query_var('paged') : 1;
    $perpage = 10;
    $offset  = ($page - 1) * $perpage;
    $args    = array(
        'posts_per_page' => $perpage
    );
    $query = new ACF_RFQ_Query($args);
?>
<?php if ( $query->have_posts() ) : while ( $query->have_posts() ) : $query->the_post(); ?>
    // something
<?php endwhile; ?>
<?php endif;?>
<?php wp_reset_postdata(); ?>

<?php
    $dates   = array();
    $args    = array(
        'posts_per_page' => -1,
        'calendar'       => true, // For get the data from not today but first day in this month.
    );
    $query = new ACF_RFQ_Query($args);
?>
<?php if ($query->have_posts()) : while ($query->have_posts()) : $query->the_post(); ?>
<?php
    $date = date('Ymd', strtotime($post->date));
    array_push($dates, $date);
?>
<?php endwhile; endif; ?>
<?php wp_reset_postdata(); ?>

<?php
    // Passing array to acf_rfq Calendar Class.
    $dates  = array_unique($dates);	// Remove some Duplicate Values(Day)
    $months = get_months_from_now(3);
    $args = array(
        'dates'        => $dates,		// (array) (required) Array of event Date ('Ymd' format)
        'months'       => $months,		// (array) (required) Array of month to generate calendar ('Ym' format)
        'weekdayLabel' => 'default',	// (string) (optional) Available value: 'default' or 'en' Note: 'default' is based on your wordpress locale setting.
        'weekdayBase'  => 0,			// (integer) (optional) The start weekday. 0:sunday ～ 6:saturday Default: 0
        'element'      => 'div',		// (string) (optional) The element for wraping. Default: 'div'
        'class'        => ''			// (string) (optional) The 'class' attribute value for wrap element. Default: ''
    );
    acf_rfq_calendar($args);
?>

<?php
    $ary     = array();
    $args    = array(
        'posts_per_page'    => -1,
        'calendar'          => true		// For get the data from not today but first day in this month.
    );
    $query = new ACF_RFQ_Query($args);
?>
<?php if ( $query->have_posts() ) : while ( $query->have_posts() ) : $query->the_post(); ?>
<?php
    $date       = date('Ymd', strtotime($post->date));
    $post_id    = $post->ID;
    $perm       = get_the_permalink();
    $title      = get_the_title();
    array_push($ary, array('date' => $date, 'id' => $post_id, 'permlink' => $perm, 'title' => $title));
?>
<?php endwhile; endif; ?>
<?php wp_reset_postdata(); ?>

<?php
    // Passing array to your Calendar Class.
    require_once 'Calendar/Month/Weeks.php';
    calendar($ary, 0);
?>

<div id="date">
    <?php echo date('Y-m-d', strtotime($post->date)); ?>
</div>
<time>
    <?php echo date("H:i", strtotime($post->starttime)); ?> ~ <?php echo date("H:i", strtotime($post->finishtime)); ?>
</time>

$months = get_months_from_now(3);

<?php
$args = array(
	'dates'        => $dates,
	'months'       => $months,
	'weekdayLabel' => 'default',
	'weekdayBase'  => 0,
	'element'      => 'div',
	'class'        => 'myclass'
);
acf_rfq_calendar($args);
?>