It only shows up once because that's how a diary would work. It would show the date at the top and you would write your entries below it. I use this code the display it the dates for each post using the_time.

<?php the_time(get_option('date_format')); ?>

For more info you can read about it here: Why the_date() Function in WordPress Only Shows Up Once on the First Post

It only shows up once because that's how a diary would work. It would show the date at the top and you would write your entries below it. I use this code the display it the dates for each post using the_time.

<?php the_time(get_option('date_format')); ?>

For more info I wrote a tutorial about it here: Why the_date() Function in WordPress Only Shows Up Once on the First Post