How to get posts on a specific date – WP Query

<?php
//  primarily get $year, $month and $day
$args = array(
    'date_query' => array(
        'year'  => $year,
        'month' => $month,
        'day'   => $day,
    )
);

$query = new WP_Query( $args );

if ( $query->have_posts() ) {
    while ( $query->have_posts() ) {

        // do whatever here

    }
}