how to query a selection of posts

Can anyone help me with this??=/

Im trying on the single.php to show the content of the post and to load all posts next to date of the post that Im in! you can see the page here: https://tinyurl.com/64sj66r

I think that I have to query all posts to search for those that the date is equal or next to the date of the post that Im in. =/ can anyone help??

now my code is like this:

<?php query_posts('order=post_date&order=asc') ?> //the condition that I have to change! =/
<?php
<div id="sort">
<?php if (have_posts()) : ?>
<?php while (have_posts()) : the_post(); ?>
<div class="box">
<?php the_content(''); ?>
<div class="aDate"><?php the_time(get_option('date_format')); ?></div>
</div>
<?php endwhile; endif; ?>
</div>

thanks in advance