// 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){
							$all_post_ids = array_merge($all_post_ids ,(array) explode(',', $result->IDs));
						}
					}
					
					$all_post_ids = array_unique($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)
			}
		}
	}
	
	
	function alter_posts_where( $where ){
		return $where . ' AND 1 = 0';
	}
	
	
	function get_dates( $dates_per_page, $limit = '', $cat = 1 ) {
		
		global $wpdb;
		
		$field = '';
		$join = '';
		$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 tt.term_id = '" . $cat . "' DESC, post_date DESC) as IDs";
			$join  = "INNER JOIN {$wpdb->term_relationships} tr ON ($wpdb->posts.ID = tr.object_id) 
			          INNER JOIN {$wpdb->term_taxonomy} tt ON (tr.term_taxonomy_id = tt.term_taxonomy_id)";
			$limit = ' LIMIT ' . (($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`, count(DISTINCT ID) as posts $field 
		FROM $wpdb->posts $join $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