Getting UNIX date formated properly in loop

UNIX format in WP loop

/** Loop for Projects **/
	$loop = new WP_Query( $args );
				
	if( $loop->have_posts() ):
		echo '<div id="container">';		
		while( $loop->have_posts() ): $loop->the_post();
		echo '<div class="projects one-third '.genesis_get_custom_field('program') . ' ' .genesis_get_custom_field('project_type') . ' ' .genesis_get_custom_field('country') . '">';
				echo '<h2><a href="' . get_permalink() . '">' . get_the_title() . '</a></h2>';
				echo '<a href="' . get_permalink() . '">' . get_the_post_thumbnail( $post_id, 'project' ). '</a>';				
				echo '<h3 class="mmi-country ' . genesis_get_custom_field('country') . '">' . genesis_get_custom_field('country') . '</h3>';
				echo '<div class="project-details">';
				echo '<p>';
				echo date('m/d/Y', $startdate);
				echo ' to ';
				echo date('m/d/Y', $finishdate);
				echo '</p>';
				if(genesis_get_custom_field('mmi_director_email')) {
				echo '<p><strong>Director:</strong> <a href="mailto:' . genesis_get_custom_field('mmi_director_email') . '">' . genesis_get_custom_field('mmi_director') . '</a></p>';
				} else {
					echo '<p><strong>Director:</strong> ' . genesis_get_custom_field('mmi_director') . '</p>';
				}
				echo '<p><strong>Type:</strong> ' . genesis_get_custom_field('project_type') . '</p>';
				if(genesis_get_custom_field('mmi_project_coordinator_email')){
				echo '<p><strong>Coordinator:</strong> <a href="mailto:' . genesis_get_custom_field('mmi_project_coordinator_email') . '">' . genesis_get_custom_field('mmi_project_coordinator') . '</a></p>';
				} else {
					echo '<p><strong>Coordinator:</strong> ' . genesis_get_custom_field('mmi_project_coordinator') . '</p>';
				}
				echo '</div>';
				echo '<a class="button" href="' . get_permalink() . '">Read More . . .</a>';
		echo '</div>';
		
		endwhile;
		?>