// change the query before posts are retrieved from the database
	add_action( 'pre_get_posts', 'my_post_queries1' );

	function my_post_queries1( $query ) {

		// not an admin page and is the main query
		if ( !is_admin() && $query->is_main_query() ) {

			// only alter the query on the home page
			if ( is_home() ) {

				// change these two values
				$dates_per_page = 4; // four dates to loop through (dates can have multiple posts)
				$top_category_id = 1; // category you want on top of same date posts

				$results = get_dates( $dates_per_page, '', $top_category_id);

				if ( $results ) {

					$all_post_ids = array();
					foreach ( $results as $result ) {

						if( isset( $result->IDs ) && $result->IDs ){

							$first = array();
							$last = array();

							$post_ids = explode( ',', (string) $result->IDs );

							if( !empty( $post_ids ) ){

								foreach((array) $post_ids as $post_id) {
									echo $post_id;
									if ( is_object_in_term( $post_id, 'category', $top_category_id ) ) {
										$first[] = $post_id;
									} else {
										$last[] = $post_id;
									}

								}

								$all_post_ids = array_merge($all_post_ids , $first);
								$all_post_ids = array_merge($all_post_ids , $last);
								$all_post_ids = array_unique($all_post_ids);

							}
						}
					}

					if(!empty($all_post_ids)){

						// don't use default pagination
						$query->set( 'nopaging', 1 );

						$query->set( 'posts_per_page', count($all_post_ids) );
						$query->set( 'post__in', $all_post_ids );
						$query->set( 'orderby', 'post__in' );
						$query->set( 'ignore_sticky_posts', 1 );

					} else {

						// if no results found -> don't query for posts
						add_filter( 'posts_where', 'alter_posts_where' );
					}

				} else {

					// if no results found -> don't query for posts
					add_filter( 'posts_where', 'alter_posts_where' );

				} // end if($results)
			} //is home
		} // main query
	}


	function alter_posts_where( $where ){
		return $where . ' AND 1 = 0';
	}


	function get_dates( $dates_per_page, $limit = '', $cat = 1 ) {

		global $wpdb;

		$field = '';
		$where = "WHERE post_type = 'post' AND post_status = 'publish'";

		if( '' == $limit ) {
			// called from pre_get_post action lets get multiple posts with $cat on top
			$paged = ( get_query_var('paged') ) ? get_query_var('paged') : 1;
			$field = ", group_concat(DISTINCT ID ORDER BY post_date DESC) as IDs";
			$limit = ' LIMIT ' . (($paged -1) * $dates_per_page) . ',' . $dates_per_page;
		}

		$query = "
		SELECT YEAR(post_date) AS `year`, MONTH(post_date) AS `month`, DAYOFMONTH(post_date) AS `dayofmonth` $field
		FROM $wpdb->posts $where
		GROUP BY YEAR(post_date), MONTH(post_date), DAYOFMONTH(post_date)
		ORDER BY post_date DESC $limit";

		return $wpdb->get_results( $query );
	}


	function next_date_link( $dates_per_page = 10, $label = 'Next Page' ){
		return previous_date_link( $dates_per_page, $label, false );
	}


	function previous_date_link( $dates_per_page = 10, $label = 'Previous Page', $prev = true ){

		$paged = ( get_query_var('paged') ) ? get_query_var('paged') : 1;

		if ( $prev ) {

			// limit to one previous post
			$count = (($paged -1) * $dates_per_page) + $dates_per_page;
			$limit = ' LIMIT ' . $count . ', 1';

		} else {

			// limit to one next post
			$count = (($paged -1) * $dates_per_page)-1;

			if ( ($count+1) < $dates_per_page )
				return '';

			$limit = ' LIMIT ' . $count . ', 1';

		}

		$results = get_dates( $dates_per_page, $limit );

		if ( $results ) {
			$pagenum = ( $prev ) ? ($paged+1) : ($paged-1);
			return '<a href="' . get_pagenum_link( $pagenum ) . '" >' .  $label . '</a>';
		}

		return '';
	}


	// display pagination function based on twentytwelve_content_nav
	// uses the previous_date_link and next_date_link functions
	function get_index_pagination_nav( $html_id , $dates_per_page = 10) {

		$html_id = esc_attr( $html_id );

		if ( is_home() ) :
			// pagination on the home page
			$prev = previous_date_link( $dates_per_page, 'Older »' );
			$next = next_date_link( $dates_per_page, '« Newer' );
			if($prev || $next) : ?>
				<nav id="<?php echo $html_id; ?>" class="navigation" role="navigation">
					<h3 class="assistive-text"><?php _e( 'Post navigation', 'twentytwelve' ); ?></h3>
					<div class="nav-previous alignleft"><?php echo $prev;  ?></div>
					<div class="nav-next alignright"><?php echo $next; ?></div>
				</nav><!-- #<?php echo $html_id; ?> .navigation -->
			<?php
			endif;

		else :
			// pagination not on the home page
			// index.php is used as a fallback template, profide pagination for these pages
			// check if the function exists (uses the twentytwelve_content_nav function from Twenty Twelve theme)
			if (function_exists( 'twentytwelve_content_nav' ) ) {
			 	twentytwelve_content_nav( $html_id );
			}

		endif;

	} // end of function get_index_pagination_nav