How to center entry-meta?

please create a child theme https://codex.www.ads-software.com/Child_Themes of Twenty Ten to work with.

in functions.php of the child theme, add:

function twentyten_posted_on() {
	printf( __( '<span class="%1$s">Posted on</span> %2$s ', 'twentyten' ),
		'meta-prep meta-prep-author',
		sprintf( '<a href="%1$s" title="%2$s" rel="bookmark"><span class="entry-date">%3$s</span></a>',
			get_permalink(),
			esc_attr( get_the_time() ),
			get_the_date()
		)
	);
}

to style.css of the child theme, add:

.entry-meta { text-align: center; }

Hi, thank you very much for your prompt response! It did work, but I decided to keep the author’s name anyway. I have now an another question: How do I add a horizontal line right under the post title, so it divines the post title and posted on? Thanks!

in loop-single.php
find <h1 class="entry-title"><?php the_title(); ?></h1>
and add
<hr>
below code above

so it will be

<h1 class="entry-title"><?php the_title(); ?></h1>
<hr>
<div class="entry-meta">
<?php twentyten_posted_on(); ?>
</div><!-- .entry-meta -->

trick above only work for single post display or posts.

Hi, thanks for your help! But, after I did that nothing has changed?! I’m using Twenty Ten newest version.

Sorry about my previous reply. Yes, it did work in single post display. But, how do I make it to show in all posts at the front page as well?

I have an another question: How to make my blog view like a desktop in which people will be able to view the whole site with everything in it as if they viewed it on a desktop? Because, I have put banner ads on both sides next to the sidebars, but when I viewed it on my iphone the banner ads overlap the page’s header totally. So, where do I have to modify to make it view like a desktop? Thanks!