RyAnaon on "Custom Post Type and WP_query"

Hello,

I'm not really sure about the section but I tried.

For a week now, I'my trying to use que custom post type correctly for my project.

But now, I managed to do what I need for the single page.

I need one more thing and this is for the archive page.

Is it possible to group the post type by month with only one wp-query or do I need to create one request for one month on my side and update it every month?

And how to display a field on the archive page like the date?

Here is the code for my page-cruises.php

<?php
/*Template Name: Cruises list*/

get_header(); ?>

    <div id="primary" class="content-area eight columns">
        <div id="content" class="site-content" role="main">

			<article class="hentry">

			    <?php
                    if ( function_exists('yoast_breadcrumb') )
                    {
                        yoast_breadcrumb('<p id="breadcrumbs">','</p>');
                    }
                ?>

				<?php $loop = new WP_Query(array( 'post_type' => 'cruises', 'posts_per_page' => 10, 'order' => 'ASC' )); ?>

				<?php while ( $loop->have_posts() ) : $loop->the_post(); ?>

				<header class="entry-header">

				<?php the_title( '<h1 class="entry-title"><a href="' . get_permalink() . '" title="' . the_title_attribute( 'echo=0' ) . '" rel="bookmark">', '</a></h1>' ); ?>

				</header>

				<div class="entry-content">
					<?php  the_excerpt(); ?>
				</div>
				<?php endwhile; ?>

			</article>

		</div><!-- #content .site-content -->

	</div><!-- #primary .content-area -->

<?php get_sidebar(); ?>

<?php get_footer(); ?>

and the custom post type on function.php :

add_action('init', 'cruises_init');
function cruises_init()
{
    $labels = array
    (
        'name' => _x('Croisières', 'post type general name'),
        'singular_name' => _x('Croisière', 'post type singular name'),
        'add_new' => _x('Ajouter nouvelle', 'portfolio item'),
        'add_new_item' => __('Ajouter nouvelle croisière'),
        'edit_item' => __('Modifier croisière'),
        'new_item' => __('Nouvelle croisière'),
        'view_item' => __('Voir croisière'),
        'search_items' => __('Chercher croisière'),
        'not_found' =>  __('Rien trouvé'),
        'not_found_in_trash' => __('Rien trouvé dans la poubelle'),
        'parent_item_colon' => ''
    );

    $args = array
    (
        'labels' => $labels,
        'public' => true,
        'publicly_queryable' => true,
        'show_ui' => true,
        'query_var' => true,
        'rewrite' => true,
        'capability_type' => 'post',
        'hierarchical' => false,
        'menu_position' => null,
        'supports' => array('title', 'editor', 'thumbnail', 'revisions', 'page-attributes')
    );

    register_post_type( 'cruises' , $args );

    register_taxonomy("Armateur", array("cruises"), array("hierarchical" => true, "label" => "Armateurs", "singular_label" => "Armateur", "rewrite" => true));

    add_action("admin_init", "admin_init");

    function admin_init(){
        add_meta_box("cruises_titles", "Titres de la croisière", "cruises_titles", "cruises", "normal", "low");
        add_meta_box("cruises_details", "Détails de la croisière", "cruises_details", "cruises", "normal", "low");
        add_meta_box("cabins", "Cabines", "cabins", "cruises", "normal", "low");
    }

    function cruises_titles()
    {
        global $post;
        $custom = get_post_custom($post->ID);
        $slogan = $custom["slogan"][0];
        $theme = $custom["theme"][0];
        ?>
        <p><label>Slogan :</label><br />
            <input type="text" name="slogan" value="<?php echo $slogan; ?>" /></p>
        <p><label>Thème :</label><br />
            <input type="text" name="theme" value="<?php echo $theme; ?>" /></p>
    <?php
    }

    function cruises_details()
    {
        global $post;
        $custom = get_post_custom($post->ID);
        $ship = $custom["ship"][0];
        $travel = $custom["travel"][0];
        $departure = $custom["departure"][0];
        $duration = $custom["duration"][0];
        $price = $custom["price"][0];
	    $details = $custom["details"][0];
        ?>
        <p><label>Navire :</label><br />
            <input type="text" name="ship" value="<?php echo $ship; ?>" /></p>
        <p><label>Circuit :</label><br />
            <textarea cols="50" rows="5" name="travel"><?php echo $travel; ?></textarea></p>
        <p><label> Date départ :</label><br />
            <input type="text" name="departure" value="<?php echo $departure; ?>" /></p>
        <p><label>Durée :</label><br />
            <input type="text" name="duration" value="<?php echo $duration; ?>" /></p>
        <p><label>Prix de départ  :</label><br />
            <input type="text" name="price" value="<?php echo $price; ?>" /></p>
	    <p><label>Détails et conditions :</label><br />
		    <textarea cols="50" rows="5" name="details"><?php echo $details; ?></textarea></p>
        <?php
    }

    function cabins()
    {
        global $post;
        $custom = get_post_custom($post->ID);
        $cabin1 = $custom["cabin1"][0];
        $cabin2 = $custom["cabin2"][0];
        $cabin3 = $custom["cabin3"][0];
        $cabin4 = $custom["cabin4"][0];
        $cabin5 = $custom["cabin5"][0];
        ?>
        <p><label>Cabine intérieure :</label><br />
            <input type="text" name="cabin1" value="<?php echo $cabin1; ?>" /></p>
        <p><label>Cabine vue sur mer :</label><br />
            <input type="text" name="cabin2" value="<?php echo $cabin2; ?>" /></p>
        <p><label>Cabine avec balcon :</label><br />
            <input type="text" name="cabin3" value="<?php echo $cabin3; ?>" /></p>
        <p><label>Cabine avec mini-suite :</label><br />
            <input type="text" name="cabin4" value="<?php echo $cabin4; ?>" /></p>
        <p><label>Cabine avec suite :</label><br />
            <input type="text" name="cabin5" value="<?php echo $cabin5; ?>" /></p>
    <?php
    }

    function save_details()
    {
        global $post;

        update_post_meta($post->ID, "slogan", $_POST["slogan"]);
        update_post_meta($post->ID, "theme", $_POST["theme"]);
        update_post_meta($post->ID, "ship", $_POST["ship"]);
        update_post_meta($post->ID, "travel", $_POST["travel"]);
        update_post_meta($post->ID, "departure", $_POST["departure"]);
        update_post_meta($post->ID, "duration", $_POST["duration"]);
        update_post_meta($post->ID, "price", $_POST["price"]);
	    update_post_meta($post->ID, "details", $_POST["details"]);
        update_post_meta($post->ID, "cabin1", $_POST["cabin1"]);
        update_post_meta($post->ID, "cabin2", $_POST["cabin2"]);
        update_post_meta($post->ID, "cabin3", $_POST["cabin3"]);
        update_post_meta($post->ID, "cabin4", $_POST["cabin4"]);
        update_post_meta($post->ID, "cabin5", $_POST["cabin5"]);
    }

    add_action('save_post', 'save_details');

}