WordPress/wp-content/themes/twentytwelve/content-image.php

<?php
/**
 * The template for displaying posts in the Image post format
 *
 * @package WordPress
 * @subpackage Twenty_Twelve
 * @since Twenty Twelve 1.0
 */
?>

	<article id="post-<?php the_ID(); ?>" <?php post_class(); ?>>
		<div class="entry-content">
			<?php the_content( __( 'Continue reading <span class="meta-nav">&rarr;</span>', 'twentytwelve' ) ); ?>
		</div><!-- .entry-content -->

		<footer class="entry-meta">
			<h1><a href="<?php the_permalink(); ?>" title="<?php echo esc_attr( sprintf( __( 'Permalink to %s', 'twentytwelve' ), the_title_attribute( 'echo=0' ) ) ); ?>" rel="bookmark"><?php the_title(); ?></a></h1>
			<h2><?php the_date(); ?></h2>
		</footer><!-- .entry-meta -->
	</article><!-- #post -->