Are you are using the_date() function in WordPress templates and getting a blank or empty value?
When more than one post is published on the same day, the_date() function displays only the date for the first post in the loop.
The right way to handle this is by using the the_time() function.
Try this:
[php]
<?php the_time(‘F j, Y’); ?> at <?php the_time(‘g:i a’); ?>
[/php]