In the WPTouch theme, the posting date is displayed in a large bubble. However, posts are added the night before, so the day is behind by one. To fix this, I changed this line:
<?php wptouch_the_time( 'j' ); ?>
to this:
<?php
$date = DateTime::createFromFormat('m-d-Y', mysql2date('m-d-Y', $post->post_date));
$date->modify('+1 day');
echo $date->format('j');
?>
This works, but is crazy ugly. I think there should be a better way to get from mysql date to php DateTime.