Display date only once for a each set of posts relating to that date

The following loop works great for me in getting posts with a given date with the use of the_time(…):

<?php
    $myPost = new WP_Query( array(
    'posts_per_page' => '50',
    'orderby' => 'modified',
    'order' => 'DESC'
    ));
    while ($myPost->have_posts()): $myPost->the_post();
?>

<div class="timeline-group">
<p class="modified-time"><?php the_time('F j, Y') ?></p>
<h5><a href="https://wordpress.stackexchange.com/questions/274206/<?php the_permalink();?>"><?php the_title();?></a></h5>
</div>

<?php
    endwhile;
    //Reset Post Data
    wp_reset_postdata();
?>

But the first 10 posts always show the same date (i.e. July 21, 2017). I want to display that date only once for these 10 posts. And if I create a new post tomorrow, then it should then show a new date under these 10 posts, and then the post associating to that new date. How can I transform my loop to think that way without hard-coding dates?

Thanks

Just use the_date(), it has this as a built-in feature.

See the dev docs for more info.