new posts show up as Jan 1, 1970

I’ve modified my childthemes functions to ‘separate’ the default date stamp. With this code, all posts default to Jan 1, 1970. Please help fix my code! Thanks!

function twentyeleven_posted_on() {
	printf( __( '<span class="sep">Posted on </span>
			   		<a href="%1$s" title="%2$s" rel="bookmark">

						<span class="custommonth">%8$s</span><span class="customday">%9$s</span><span class="customyear">%10$s</span>
			   		</a>
			   <span class="by-author"> <span class="sep"> by </span> <span class="author vcard">
			   <a class="url fn n" href="%5$s" title="%6$s" rel="author">%7$s</a></span></span>', 'twentyeleven' ),
		esc_url( get_permalink() ),
		esc_attr( get_the_time() ),
		esc_attr( get_the_date( 'c' ) ),
		esc_html( get_the_date() ),
		esc_url( get_author_posts_url( get_the_author_meta( 'ID' ) ) ),
		sprintf( esc_attr__( 'View all posts by %s', 'twentyeleven' ), get_the_author() ),
		esc_html( get_the_author() ),
		date("M", strtotime(get_the_date())),
		date("j", strtotime(get_the_date())),
		date("Y", strtotime(get_the_date()))
	);
}
endif;